{"id":1383,"date":"2023-04-24T11:32:43","date_gmt":"2023-04-24T09:32:43","guid":{"rendered":"https:\/\/www.fredonoccitanie.com\/ambroisies\/?page_id=1383"},"modified":"2023-07-13T16:44:01","modified_gmt":"2023-07-13T14:44:01","slug":"les-ambroisies","status":"publish","type":"page","link":"https:\/\/www.fredonoccitanie.com\/eesh\/les-ambroisies\/","title":{"rendered":"Les Ambroisies"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-bkoo7r-2f4db63453608999c099d6ef65348e64\">\n.flex_column.av-bkoo7r-2f4db63453608999c099d6ef65348e64{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-bkoo7r-2f4db63453608999c099d6ef65348e64 av_one_half  avia-builder-el-0  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lh7p4p6k-c7c3682feca9991363cf4302fcbf6afd\">\n#top .hr.hr-invisible.av-lh7p4p6k-c7c3682feca9991363cf4302fcbf6afd{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-lh7p4p6k-c7c3682feca9991363cf4302fcbf6afd hr-invisible  avia-builder-el-1  el_before_av_textblock  avia-builder-el-first '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-lh6e6bg6-25f6fcbd63774515849122fd29967270 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h1 style=\"text-align: center\"><\/h1>\n<h1 style=\"text-align: center\">Des graines, du pollen et des allergies<\/h1>\n<p>Vous pouvez retrouver <strong>ci-contre une vid\u00e9o explicative<\/strong> r\u00e9alis\u00e9e par l&rsquo;Observatoire National des Esp\u00e8ces \u00e0 Enjeux pour la Sant\u00e9 Humaine qui g\u00e8re l&rsquo;<strong>Observatoire National des Ambroisies<\/strong> (OA).<\/p>\n<p>Cette vid\u00e9o d\u00e9crit <strong>la probl\u00e9matique sur le th\u00e8me de l&rsquo;Ambroisie \u00e0 feuilles d&rsquo;armoise <\/strong>quasi-omnipr\u00e9sente sur le territoire m\u00e9tropolitain.<\/p>\n<\/div><\/section><\/p><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-p0vmf-ea49f2c65e3a1fe3027defc9c62f9879\">\n.flex_column.av-p0vmf-ea49f2c65e3a1fe3027defc9c62f9879{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-p0vmf-ea49f2c65e3a1fe3027defc9c62f9879 av_one_half  avia-builder-el-3  el_after_av_one_half  el_before_av_section  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lh6e5gev-5310a37e63a2006d12bf7e5d160a388c\">\n.avia-video.av-lh6e5gev-5310a37e63a2006d12bf7e5d160a388c{\nbackground-image:url(https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2022\/04\/video_ambroisie-300x172.png);\n}\n<\/style>\n<div  class='avia-video av-lh6e5gev-5310a37e63a2006d12bf7e5d160a388c avia-video-16-9 av-preview-image avia-video-load-always av-lazyload-immediate av-lazyload-video-embed'  itemprop=\"video\" itemtype=\"https:\/\/schema.org\/VideoObject\"  data-original_url='https:\/\/www.youtube.com\/watch?v=Gup1wg2Iaic&amp;list=PLEJX7ly3C1b4aEWAooNLc_T0Jjlexkl_U&amp;index=8'><script type='text\/html' class='av-video-tmpl'><div class='avia-iframe-wrap'><iframe loading=\"lazy\" title=\"Ambroisie - des graines, du pollen et des allergies-Version longue\" width=\"1500\" height=\"844\" src=\"https:\/\/www.youtube.com\/embed\/Gup1wg2Iaic?list=PLEJX7ly3C1b4aEWAooNLc_T0Jjlexkl_U&autoplay=1&loop=0&controls=1&mute=1\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/div><\/script><div class='av-click-to-play-overlay'><div class=\"avia_playpause_icon\"><\/div><\/div><\/div><\/div>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2i3cbr-66a100fdd7e37776bb51afd5616cd1f6\">\n.avia-section.av-2i3cbr-66a100fdd7e37776bb51afd5616cd1f6{\nbackground-color:#d1dae6;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_1'  class='avia-section av-2i3cbr-66a100fdd7e37776bb51afd5616cd1f6 main_color avia-section-default avia-no-border-styling  avia-builder-el-5  el_after_av_one_half  el_before_av_textblock  avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-1383'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-73va07-eb8447540f88c6c80d08f6081e34f0a3\">\n.flex_column.av-73va07-eb8447540f88c6c80d08f6081e34f0a3{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-73va07-eb8447540f88c6c80d08f6081e34f0a3 av_one_full  avia-builder-el-6  el_before_av_one_third  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-lgun14v8-1cf113b5344ca2512debf8ded4bee9c3 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h1>3 Esp\u00e8ces d&rsquo;Ambroisie envahissantes et pr\u00e9occupantes<\/h1>\n<h4>G\u00e9n\u00e9ralit\u00e9s<\/h4>\n<p>Les <strong>Ambroisies (<em>Ambrosia sp.<\/em>)<\/strong> sont des plantes de la famille des <strong>Ast\u00e9rac\u00e9es<\/strong>. Elles sont subdivis\u00e9es en plusieurs esp\u00e8ces dont 3 sont consid\u00e9r\u00e9es comme exotiques envahissantes faisant l&rsquo;objet d&rsquo;un arr\u00eat\u00e9 pr\u00e9fectoral. <strong>Ces 3 esp\u00e8ces ont une biologie et des m\u00e9thodes de diss\u00e9mination similaires<\/strong>. Retrouvez les similitudes sur cette page :<\/p>\n<\/div><\/section><br \/>\n<div  class='avia-buttonrow-wrap av-li8nyrnx-b7185697aba150afe19c4f85eac4fea5 avia-buttonrow-center  avia-builder-el-8  el_after_av_textblock  el_before_av_hr '>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-li8nvg6v-7148ab29e7fb882172dabb3866da6d42\">\n#top #wrap_all .avia-button.av-li8nvg6v-7148ab29e7fb882172dabb3866da6d42{\nbackground-color:#0c4e67;\nborder-color:#0c4e67;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\nmargin-bottom:5px;\nmargin-right:3px;\nmargin-left:3px;\n}\n#top #wrap_all .avia-button.av-li8nvg6v-7148ab29e7fb882172dabb3866da6d42 .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='#ancre1'  class='avia-button av-li8nvg6v-7148ab29e7fb882172dabb3866da6d42 avia-icon_select-yes-left-icon avia-size-small'   aria-label=\"Biologie : Emission de pollen et Reproduction\"><span class='avia_button_icon avia_button_icon_left avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue86f' data-av_iconfont='entypo-fontello' ><\/span><span class='avia_iconbox_title' >Biologie : Emission de pollen et Reproduction<\/span><\/a>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-li8nvrtq-2597fe66621cc7ad67534f17eceeb93f\">\n#top #wrap_all .avia-button.av-li8nvrtq-2597fe66621cc7ad67534f17eceeb93f{\nbackground-color:#0c4e67;\nborder-color:#0c4e67;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\nmargin-bottom:5px;\nmargin-right:3px;\nmargin-left:3px;\n}\n#top #wrap_all .avia-button.av-li8nvrtq-2597fe66621cc7ad67534f17eceeb93f .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='#ancre2'  class='avia-button av-li8nvrtq-2597fe66621cc7ad67534f17eceeb93f avia-icon_select-yes-left-icon avia-size-small'   aria-label=\"Colonisation et Dispersion sur le territoire\"><span class='avia_button_icon avia_button_icon_left avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue86f' data-av_iconfont='entypo-fontello' ><\/span><span class='avia_iconbox_title' >Colonisation et Dispersion sur le territoire<\/span><\/a>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-li8nw52f-4e901a79ac3aaac9173d264ae9b7d3b0\">\n#top #wrap_all .avia-button.av-li8nw52f-4e901a79ac3aaac9173d264ae9b7d3b0{\nbackground-color:#0c4e67;\nborder-color:#0c4e67;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\nmargin-bottom:5px;\nmargin-right:3px;\nmargin-left:3px;\n}\n#top #wrap_all .avia-button.av-li8nw52f-4e901a79ac3aaac9173d264ae9b7d3b0 .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='#ancre3'  class='avia-button av-li8nw52f-4e901a79ac3aaac9173d264ae9b7d3b0 avia-icon_select-yes-left-icon avia-size-small'   aria-label=\"Surveillance du territoire et R\u00e9glementation\"><span class='avia_button_icon avia_button_icon_left avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue86f' data-av_iconfont='entypo-fontello' ><\/span><span class='avia_iconbox_title' >Surveillance du territoire et R\u00e9glementation<\/span><\/a>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-li8vwk7j-b38899db3ff494ea7fed6dec0f02510a\">\n#top #wrap_all .avia-button.av-li8vwk7j-b38899db3ff494ea7fed6dec0f02510a{\nmargin-bottom:5px;\nmargin-right:3px;\nmargin-left:3px;\n}\n<\/style>\n<a href='#ancre4'  class='avia-button av-li8vwk7j-b38899db3ff494ea7fed6dec0f02510a avia-icon_select-yes-left-icon avia-size-small avia-color-red'   aria-label=\"Liens utiles - Ambroisies\"><span class='avia_button_icon avia_button_icon_left avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue82b' data-av_iconfont='entypo-fontello' ><\/span><span class='avia_iconbox_title' >Liens utiles - Ambroisies<\/span><\/a>\n<\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-li8o48py-6b6e7fae1c385572587d4324439be868\">\n#top .hr.hr-invisible.av-li8o48py-6b6e7fae1c385572587d4324439be868{\nheight:20px;\n}\n<\/style>\n<div  class='hr av-li8o48py-6b6e7fae1c385572587d4324439be868 hr-invisible  avia-builder-el-9  el_after_av_buttonrow  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-li8o30kz-98f4c2a0dd62f47eba0fb8835d71f203 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h4>Sp\u00e9cificit\u00e9s des 3 esp\u00e8ces<\/h4>\n<p>Retrouvez sur les pages de chaque esp\u00e8ces des informations plus sp\u00e9cifiques \u00e0 chacune : reconnaissance sp\u00e9cifique, localisation et moyens de lutte.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-58pkyv-e11a43cce78fa173ff76a036cc85e253\">\n.flex_column.av-58pkyv-e11a43cce78fa173ff76a036cc85e253{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-58pkyv-e11a43cce78fa173ff76a036cc85e253 av_one_third  avia-builder-el-11  el_after_av_one_full  el_before_av_one_third  first flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lgumqvqe-8f07290e3d54537cd6333f2bc08dbc13\">\n.avia-image-container.av-lgumqvqe-8f07290e3d54537cd6333f2bc08dbc13 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lgumqvqe-8f07290e3d54537cd6333f2bc08dbc13 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lgumqvqe-8f07290e3d54537cd6333f2bc08dbc13 av-styling- av-img-linked avia-align-center  avia-builder-el-12  el_before_av_textblock  avia-builder-el-first  av-has-copyright av-copyright-icon-reveal'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/www.fredonoccitanie.com\/ambroisies\/lambroisie\/\" class='avia_image '  target=\"_blank\"  rel=\"noopener noreferrer\" aria-label='20230503_AA_2stades_TOP'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-1549 avia-img-lazy-loading-not-1549 avia_image ' src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230503_AA_2stades_TOP-300x225.jpg\" alt='' title='20230503_AA_2stades_TOP'  height=\"225\" width=\"300\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230503_AA_2stades_TOP-300x225.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230503_AA_2stades_TOP-1030x773.jpg 1030w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230503_AA_2stades_TOP-768x576.jpg 768w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230503_AA_2stades_TOP-1536x1152.jpg 1536w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230503_AA_2stades_TOP-2048x1536.jpg 2048w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230503_AA_2stades_TOP-1500x1125.jpg 1500w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230503_AA_2stades_TOP-705x529.jpg 705w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/div><small class=\"avia-copyright\">\u00a9FREDON Occitanie<span class='avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='info' data-av_iconset='svg_entypo-fontello'><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewBox=\"0 0 15 32\" preserveAspectRatio=\"xMidYMid meet\" aria-labelledby='av-svg-title-1' aria-describedby='av-svg-desc-1' role=\"graphics-symbol\">\n<title id='av-svg-title-1'>Info<\/title>\n<desc id='av-svg-desc-1'>Info<\/desc>\n<path d=\"M11.264 0q1.536 0 2.368 0.864t0.832 2.208q0 1.6-1.248 2.816t-3.040 1.216q-1.536 0-2.368-0.832t-0.768-2.304q0-1.472 1.12-2.72t3.104-1.248zM4.672 32q-3.2 0-1.728-5.696l1.92-8.128q0.448-1.792 0-1.792-0.384 0-1.728 0.576t-2.304 1.216l-0.832-1.408q2.88-2.496 6.048-4.032t4.832-1.536q2.496 0 1.152 5.184l-2.24 8.512q-0.512 2.048 0.192 2.048 1.408 0 3.776-1.92l0.96 1.28q-2.688 2.752-5.6 4.224t-4.448 1.472z\"><\/path>\n<\/svg><\/span><\/small><\/div><\/div><br \/>\n<section  class='av_textblock_section av-lgumprqu-8719440cf6d8bdabbdf0500af60d0b76 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h5 style=\"text-align: center\"><a href=\"https:\/\/www.fredonoccitanie.com\/ambroisies\/lambroisie\/\" target=\"_blanck\">L&rsquo;Ambroisie \u00e0 feuilles d&rsquo;armoise<\/a><br \/>\n(<em>Ambrosia artemisiifolia L.<\/em>)<\/h5>\n<h5 style=\"text-align: center\"><\/h5>\n<p style=\"text-align: center\">Cette ambroisie est pr\u00e9sente dans l&rsquo;<strong>ensemble des milieux (collectivit\u00e9, bords de route, agricole, for\u00eat, &#8230;etc.)<\/strong> et sur l&rsquo;ensemble du territoire France m\u00e9tropolitaine.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4ssg93-20a127f65c40816b01a04667ce8ae62a\">\n.flex_column.av-4ssg93-20a127f65c40816b01a04667ce8ae62a{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-4ssg93-20a127f65c40816b01a04667ce8ae62a av_one_third  avia-builder-el-14  el_after_av_one_third  el_before_av_one_third  flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lgumrekn-9d9f199e0a2fd7d54f54213f195bd7be\">\n.avia-image-container.av-lgumrekn-9d9f199e0a2fd7d54f54213f195bd7be img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lgumrekn-9d9f199e0a2fd7d54f54213f195bd7be .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lgumrekn-9d9f199e0a2fd7d54f54213f195bd7be av-styling- av-img-linked avia-align-center  avia-builder-el-15  el_before_av_textblock  avia-builder-el-first  av-has-copyright av-copyright-icon-reveal'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/www.fredonoccitanie.com\/ambroisies\/lambroisie-trifide-ambrosia-trifida\/\" class='avia_image '  target=\"_blank\"  rel=\"noopener noreferrer\" aria-label='Ambrosia_trifida_FREDNOPACA-scaled_trifide'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-1386 avia-img-lazy-loading-not-1386 avia_image ' src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/Ambrosia_trifida_FREDNOPACA-scaled_trifide-300x218.jpg\" alt='' title='Ambrosia_trifida_FREDNOPACA-scaled_trifide'  height=\"218\" width=\"300\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/Ambrosia_trifida_FREDNOPACA-scaled_trifide-300x218.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/Ambrosia_trifida_FREDNOPACA-scaled_trifide-1030x747.jpg 1030w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/Ambrosia_trifida_FREDNOPACA-scaled_trifide-768x557.jpg 768w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/Ambrosia_trifida_FREDNOPACA-scaled_trifide-1536x1114.jpg 1536w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/Ambrosia_trifida_FREDNOPACA-scaled_trifide-1500x1088.jpg 1500w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/Ambrosia_trifida_FREDNOPACA-scaled_trifide-705x511.jpg 705w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/Ambrosia_trifida_FREDNOPACA-scaled_trifide.jpg 1833w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/div><small class=\"avia-copyright\">Observatoire des Ambroises<span class='avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='info' data-av_iconset='svg_entypo-fontello'><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewBox=\"0 0 15 32\" preserveAspectRatio=\"xMidYMid meet\" aria-labelledby='av-svg-title-2' aria-describedby='av-svg-desc-2' role=\"graphics-symbol\">\n<title id='av-svg-title-2'>Info<\/title>\n<desc id='av-svg-desc-2'>Info<\/desc>\n<path d=\"M11.264 0q1.536 0 2.368 0.864t0.832 2.208q0 1.6-1.248 2.816t-3.040 1.216q-1.536 0-2.368-0.832t-0.768-2.304q0-1.472 1.12-2.72t3.104-1.248zM4.672 32q-3.2 0-1.728-5.696l1.92-8.128q0.448-1.792 0-1.792-0.384 0-1.728 0.576t-2.304 1.216l-0.832-1.408q2.88-2.496 6.048-4.032t4.832-1.536q2.496 0 1.152 5.184l-2.24 8.512q-0.512 2.048 0.192 2.048 1.408 0 3.776-1.92l0.96 1.28q-2.688 2.752-5.6 4.224t-4.448 1.472z\"><\/path>\n<\/svg><\/span><\/small><\/div><\/div><br \/>\n<section  class='av_textblock_section av-lgumq6mx-2e6b96815fd0b7392e7e5712f77a46bc '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h5 style=\"text-align: center\"><a href=\"https:\/\/www.fredonoccitanie.com\/ambroisies\/lambroisie-trifide-ambrosia-trifida\/\" target=\"_blanck\">L&rsquo;Ambroisie trifide<\/a><br \/>\n(<em>Ambrosia trifida L.<\/em>)<\/h5>\n<p style=\"text-align: center\">Ambroisie <strong>encore cantonn\u00e9e aux zones agricoles<\/strong>, elle ne manquera pas comme sa cousine \u00e0 feuilles d&rsquo;armoise \u00e0 venir coloniser les bords de route et autres milieux d\u00e9couverts propices \u00e0 son d\u00e9veloppement.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-26abef-87e33f9c2525eea491e793eb98f1bb4b\">\n.flex_column.av-26abef-87e33f9c2525eea491e793eb98f1bb4b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-26abef-87e33f9c2525eea491e793eb98f1bb4b av_one_third  avia-builder-el-17  el_after_av_one_third  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lgumso7q-3ee7f8daa6331283f248d244f0020c3b\">\n.avia-image-container.av-lgumso7q-3ee7f8daa6331283f248d244f0020c3b img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lgumso7q-3ee7f8daa6331283f248d244f0020c3b .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lgumso7q-3ee7f8daa6331283f248d244f0020c3b av-styling- av-img-linked avia-align-center  avia-builder-el-18  el_before_av_textblock  avia-builder-el-first  av-has-copyright av-copyright-icon-reveal'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/www.fredonoccitanie.com\/ambroisies\/lambroisie-a-epis-lisses-ambrosia-psilostachya\/\" class='avia_image '  target=\"_blank\"  rel=\"noopener noreferrer\" aria-label='epis_lisses'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-1387 avia-img-lazy-loading-not-1387 avia_image ' src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/epis_lisses-300x225.jpg\" alt='' title='epis_lisses'  height=\"225\" width=\"300\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/epis_lisses-300x225.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/epis_lisses-1030x773.jpg 1030w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/epis_lisses-768x576.jpg 768w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/epis_lisses-1536x1152.jpg 1536w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/epis_lisses-2048x1536.jpg 2048w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/epis_lisses-1500x1125.jpg 1500w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/epis_lisses-705x529.jpg 705w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/div><small class=\"avia-copyright\">Observatoire des Ambroises<span class='avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='info' data-av_iconset='svg_entypo-fontello'><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewBox=\"0 0 15 32\" preserveAspectRatio=\"xMidYMid meet\" aria-labelledby='av-svg-title-3' aria-describedby='av-svg-desc-3' role=\"graphics-symbol\">\n<title id='av-svg-title-3'>Info<\/title>\n<desc id='av-svg-desc-3'>Info<\/desc>\n<path d=\"M11.264 0q1.536 0 2.368 0.864t0.832 2.208q0 1.6-1.248 2.816t-3.040 1.216q-1.536 0-2.368-0.832t-0.768-2.304q0-1.472 1.12-2.72t3.104-1.248zM4.672 32q-3.2 0-1.728-5.696l1.92-8.128q0.448-1.792 0-1.792-0.384 0-1.728 0.576t-2.304 1.216l-0.832-1.408q2.88-2.496 6.048-4.032t4.832-1.536q2.496 0 1.152 5.184l-2.24 8.512q-0.512 2.048 0.192 2.048 1.408 0 3.776-1.92l0.96 1.28q-2.688 2.752-5.6 4.224t-4.448 1.472z\"><\/path>\n<\/svg><\/span><\/small><\/div><\/div><br \/>\n<section  class='av_textblock_section av-lgumqf55-aa84821b141ad12245f3517a6605f88b '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h5 style=\"text-align: center\"><a href=\"https:\/\/www.fredonoccitanie.com\/ambroisies\/lambroisie-a-epis-lisses-ambrosia-psilostachya\/\" target=\"_blanck\">L&rsquo;Ambroisie \u00e0 \u00e9pis lisses<\/a><br \/>\n(<em>Ambrosia psilostachva DC.<\/em>)<\/h5>\n<p style=\"text-align: center\">En Occitanie, elle n&rsquo;a \u00e9t\u00e9 recens\u00e9e que dans le Gard. Elle appr\u00e9cie particuli\u00e8rement<strong> les zones aquatiques<\/strong> et s&rsquo;y d\u00e9veloppe avec une racine souterraine tra\u00e7ante.<\/p>\n<\/div><\/section><\/p><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='after_section_1'  class='main_color av_default_container_wrap container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-1383'><div class='entry-content-wrapper clearfix'><section  class='av_textblock_section av-li8nrvwd-f052d200e4f9d5627f49cb461352211c '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h1>3 Esp\u00e8ces d&rsquo;Ambroisie mais une biologie similaire<\/h1>\n<\/div><\/section><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-56azon-e95ecbe358812b4ac9af32e24915eff3\">\n.flex_column.av-56azon-e95ecbe358812b4ac9af32e24915eff3{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-56azon-e95ecbe358812b4ac9af32e24915eff3 av_three_fifth  avia-builder-el-21  el_after_av_textblock  el_before_av_two_fifth  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-li8o6e4f-ae117522d3f51eb6c1bf392f216e26f1 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 id=\"ancre1\"><strong>Biologie, \u00e9mission de pollen et reproduction<\/strong><\/h3>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-lh6dmv9s-ed76baf8427be0e7cc7e644743cf5023 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"wpb_text_column wpb_content_element \">\n<p>L\u2019ambroisie est une plante annuelle relativement tardive. Elle va <strong>germer au printemps \u00e0 partir du mois d&rsquo;avril dans nos r\u00e9gions<\/strong>. Cette germination est \u00e9chelonn\u00e9e et il est possible de trouver des plantules jusqu&rsquo;au mois de juillet qui arrivera aussi \u00e0 d\u00e9velopper un \u00e9pis floral qui donnera quelques graines. Cette capacit\u00e9 de germination sur une aussi longue p\u00e9riode explique la <strong>difficult\u00e9 de lutte dans les diff\u00e9rents milieux<\/strong>. De plus, elle peut aussi rebourgeonner apr\u00e8s une destruction partielle (coupe, d\u00e9sherbage,&#8230;etc.).<\/p>\n<p>Apr\u00e8s sa germination, l&rsquo;ambroisie continue son <strong>d\u00e9veloppement rapide en port buissonnant<\/strong> pouvant atteindre 1m \u00e0 4m pour l&rsquo;Ambroisie trifide jusqu\u2019\u00e0 l\u2019\u00e9mission de fleurs.<\/p>\n<p>Ces fleurs vont <strong>\u00e9mettre du pollen<\/strong> qui se propage \u00e0 partir de d\u00e9but ao\u00fbt, avec un pic en septembre jusqu&rsquo;\u00e0 un d\u00e9clin en octobre. Le pollen \u00e9mis par les fleurs m\u00e2le est microscopique (entre 18 et 20 \u00b5m de diam\u00e8tre) et <strong>est transport\u00e9 par le vent jusqu&rsquo;\u00e0 40km alentour<\/strong>. Un seul pied est capable de produire plusieurs millions de grains de pollen chaque jour. M\u00eame rabattue ou taill\u00e9e, la plante conserve une capacit\u00e9 d\u2019\u00e9mission de pollen tr\u00e8s importante. La capacit\u00e9 d\u2019\u00e9mission de pollen est conditionn\u00e9e par les conditions climatiques :<\/p>\n<ul>\n<li><em>Un temps sec et vent\u00e9 avec une temp\u00e9rature douce<\/em> = facilite l\u2019\u00e9mission qui est \u00e0 son maximum le matin et jusqu\u2019en milieu de journ\u00e9e<\/li>\n<li><em>Un temps frais et humide<\/em> = emp\u00eachent l\u2019ouverture des fleurs m\u00e2les ainsi que l\u2019entra\u00eenement du pollen par le vent<\/li>\n<\/ul>\n<p>Le <a href=\"https:\/\/www.pollens.fr\/les-bulletins\/bulletin-allergo-pollinique\" target=\"_blanck\" rel=\"noopener\">R\u00e9seau National de Surveillance A\u00e9robiologique (RNSA)<\/a> propose un bilan pollinique hebdomadaire et permet d&rsquo;avoir un suivi pr\u00e9cis de l&rsquo;arriv\u00e9e des pollens d&rsquo;Ambroisies.<\/p>\n<p>A la suite de la production de pollen, les <strong>fleurs femelles f\u00e9cond\u00e9es produisent des graines en grande quantit\u00e9<\/strong> (jusqu&rsquo;\u00e0 3 000 par pied pour l&rsquo;ambroisie \u00e0 feuilles d&rsquo;armoise). Ces graines ne sont pas propag\u00e9es par les animaux ou le vent et <strong>vont tomber sur le sol \u00e0 proximit\u00e9<\/strong> de la plante m\u00e8re (sauf broyage tardif ou moisson tardive qui vont contribuer \u00e0 la propagation sur une plus grande zone). De ce fait, le <strong>stock de graine s&rsquo;accroit chaque ann\u00e9e<\/strong> et est capable de produire de tr\u00e8s nombreuses g\u00e9n\u00e9rations d\u2019ambroisie les ann\u00e9es suivantes.<\/p>\n<p>L&rsquo;Ambroisie \u00e0 feuilles d&rsquo;armoise et l&rsquo;Ambroisie trifide sont des plantes annuelles et apr\u00e8s cette derni\u00e8re phase d&rsquo;\u00e9mission de graines, elles vont mourir et recommencer leur nouvelle g\u00e9n\u00e9ration au printemps suivant. Cela n&rsquo;est pas vrai pour l&rsquo;Ambroisie \u00e0 \u00e9pis lisse qui va se reproduire par des drageons (syst\u00e8me racinaire).<br \/>\n<em>Source : <a href=\"https:\/\/ambroisie-risque.info\/quest-ce-que-lambroisie\/\" target=\"_blanck\" rel=\"noopener\">Observatoire des Ambroisies<\/a><\/em><\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4lh187-676ed7af4dbf5ca0bc1470802b6aa843\">\n.flex_column.av-4lh187-676ed7af4dbf5ca0bc1470802b6aa843{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-4lh187-676ed7af4dbf5ca0bc1470802b6aa843 av_two_fifth  avia-builder-el-24  el_after_av_three_fifth  el_before_av_section  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-li8phui2-0fae9d5d2a2fbb574c06b7e4fdae4240\">\n#top .hr.hr-invisible.av-li8phui2-0fae9d5d2a2fbb574c06b7e4fdae4240{\nheight:40px;\n}\n<\/style>\n<div  class='hr av-li8phui2-0fae9d5d2a2fbb574c06b7e4fdae4240 hr-invisible  avia-builder-el-25  el_before_av_textblock  avia-builder-el-first '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-li8olk3n-d1abbaab37726f0c989f4655fdd6b1b4 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center\"><em>Cliquez sur les images pour agrandir<\/em><\/p>\n<\/div><\/section><br \/>\n<div  class='avia-slideshow av-li8odate-bbbd3c12868c9d6fb7cc4362457dadfe avia-slideshow-large av_slideshow avia-slide-slider  avia-builder-el-27  el_after_av_textblock  avia-builder-el-last  av-slideshow-ui av-control-default av-slideshow-autoplay av-loop-endless av-loop-manual-endless av-default-height-applied avia-slideshow-1' data-slideshow-options=\"{&quot;animation&quot;:&quot;slide&quot;,&quot;autoplay&quot;:true,&quot;loop_autoplay&quot;:&quot;endless&quot;,&quot;interval&quot;:10,&quot;loop_manual&quot;:&quot;manual-endless&quot;,&quot;autoplay_stopper&quot;:false,&quot;noNavigation&quot;:false,&quot;bg_slider&quot;:false,&quot;keep_padding&quot;:false,&quot;hoverpause&quot;:false,&quot;show_slide_delay&quot;:0}\"  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><ul class='avia-slideshow-inner ' style='padding-bottom: 81.903485254692%;'><li  class='avia-slideshow-slide av-li8odate-bbbd3c12868c9d6fb7cc4362457dadfe__0  slide-1 slide-odd'><a href=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/2023_cycleTerresInovia.jpg\" data-srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/2023_cycleTerresInovia.jpg 746w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/2023_cycleTerresInovia-300x246.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/2023_cycleTerresInovia-705x577.jpg 705w\" data-sizes=\"(max-width: 746px) 100vw, 746px\"  data-rel='slideshow-1' class='avia-slide-wrap '   ><div class='av-slideshow-caption av-li8odate-bbbd3c12868c9d6fb7cc4362457dadfe__0 avia-caption'><div class=\"avia-inner-caption\"><div class='avia-caption-content '  itemprop=\"description\" ><p>Cycle de d\u00e9veloppement des Ambroisies \u00a9 Terres Inovia<\/p>\n<\/div><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-1828 avia-img-lazy-loading-not-1828\"  src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/2023_cycleTerresInovia.jpg\" width=\"746\" height=\"611\" title='2023_cycleTerresInovia' alt=''  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/2023_cycleTerresInovia.jpg 746w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/2023_cycleTerresInovia-300x246.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/2023_cycleTerresInovia-705x577.jpg 705w\" sizes=\"(max-width: 746px) 100vw, 746px\" \/><\/a><\/li><li  class='avia-slideshow-slide av-li8odate-bbbd3c12868c9d6fb7cc4362457dadfe__1  slide-2 slide-even'><a href=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/photo_fleur-pollen.jpg\" data-srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/photo_fleur-pollen.jpg 683w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/photo_fleur-pollen-200x300.jpg 200w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/photo_fleur-pollen-470x705.jpg 470w\" data-sizes=\"(max-width: 683px) 100vw, 683px\"  data-rel='slideshow-1' class='avia-slide-wrap '   ><div class='av-slideshow-caption av-li8odate-bbbd3c12868c9d6fb7cc4362457dadfe__1 avia-caption'><div class=\"avia-inner-caption\"><div class='avia-caption-content '  itemprop=\"description\" ><p>Pollen d&rsquo;Ambroisie \u00a9 C. Bohren (2008)<\/p>\n<\/div><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-308 avia-img-lazy-loading-not-308\"  src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/photo_fleur-pollen.jpg\" width=\"683\" height=\"1024\" title='Pollen Ambroisie' alt=''  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/photo_fleur-pollen.jpg 683w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/photo_fleur-pollen-200x300.jpg 200w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/photo_fleur-pollen-470x705.jpg 470w\" sizes=\"(max-width: 683px) 100vw, 683px\" \/><\/a><\/li><\/ul><div class='avia-slideshow-arrows avia-slideshow-controls' ><a href='#prev' class='prev-slide  avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='left-open-big' data-av_iconset='svg_entypo-fontello' tabindex='-1' title=\"Pr\u00e9c\u00e9dent\"><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewBox=\"0 0 15 32\" preserveAspectRatio=\"xMidYMid meet\" aria-labelledby='av-svg-title-4' aria-describedby='av-svg-desc-4' role=\"graphics-symbol\" aria-hidden=\"true\">\n<title id='av-svg-title-4'>Pr\u00e9c\u00e9dent<\/title>\n<desc id='av-svg-desc-4'>Pr\u00e9c\u00e9dent<\/desc>\n<path d=\"M14.464 27.84q0.832 0.832 0 1.536-0.832 0.832-1.536 0l-12.544-12.608q-0.768-0.768 0-1.6l12.544-12.608q0.704-0.832 1.536 0 0.832 0.704 0 1.536l-11.456 11.904z\"><\/path>\n<\/svg><span class='avia_hidden_link_text'>Pr\u00e9c\u00e9dent<\/span><\/a><a href='#next' class='next-slide  avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='right-open-big' data-av_iconset='svg_entypo-fontello' tabindex='-1' title=\"Suivant\"><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewBox=\"0 0 15 32\" preserveAspectRatio=\"xMidYMid meet\" aria-labelledby='av-svg-title-5' aria-describedby='av-svg-desc-5' role=\"graphics-symbol\" aria-hidden=\"true\">\n<title id='av-svg-title-5'>Suivant<\/title>\n<desc id='av-svg-desc-5'>Suivant<\/desc>\n<path d=\"M0.416 27.84l11.456-11.84-11.456-11.904q-0.832-0.832 0-1.536 0.832-0.832 1.536 0l12.544 12.608q0.768 0.832 0 1.6l-12.544 12.608q-0.704 0.832-1.536 0-0.832-0.704 0-1.536z\"><\/path>\n<\/svg><span class='avia_hidden_link_text'>Suivant<\/span><\/a><\/div><div class='avia-slideshow-dots avia-slideshow-controls'><a href='#1' class='goto-slide active' >1<\/a><a href='#2' class='goto-slide ' >2<\/a><\/div><\/div><\/p><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4tqqtj-78946bedf009cc5b992c7e43cca2585c\">\n.avia-section.av-4tqqtj-78946bedf009cc5b992c7e43cca2585c{\nbackground-color:#d1dae6;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_2'  class='avia-section av-4tqqtj-78946bedf009cc5b992c7e43cca2585c main_color avia-section-default avia-no-border-styling  avia-builder-el-28  el_after_av_two_fifth  el_before_av_two_third  avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-1383'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-5f1f4n-df31a81fa0b605c9300ab925bf2e575a\">\n.flex_column.av-5f1f4n-df31a81fa0b605c9300ab925bf2e575a{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-5f1f4n-df31a81fa0b605c9300ab925bf2e575a av_two_fifth  avia-builder-el-29  el_before_av_three_fifth  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lh7pnx5r-5391e2e773024d7bc94dff9eceb898b8\">\n#top .hr.hr-invisible.av-lh7pnx5r-5391e2e773024d7bc94dff9eceb898b8{\nheight:70px;\n}\n<\/style>\n<div  class='hr av-lh7pnx5r-5391e2e773024d7bc94dff9eceb898b8 hr-invisible  avia-builder-el-30  el_before_av_textblock  avia-builder-el-first '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-2bxahz-36e00dc1acf6ffb9519b55238362d914 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center\"><em>Cliquez sur les images pour agrandir<\/em><\/p>\n<\/div><\/section><br \/>\n<div  class='avia-slideshow av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8 avia-slideshow-gallery av_slideshow avia-slide-slider  avia-builder-el-32  el_after_av_textblock  avia-builder-el-last  av-slideshow-ui av-control-default av-slideshow-autoplay av-loop-endless av-loop-manual-endless av-default-height-applied avia-slideshow-2' data-slideshow-options=\"{&quot;animation&quot;:&quot;slide&quot;,&quot;autoplay&quot;:true,&quot;loop_autoplay&quot;:&quot;endless&quot;,&quot;interval&quot;:5,&quot;loop_manual&quot;:&quot;manual-endless&quot;,&quot;autoplay_stopper&quot;:false,&quot;noNavigation&quot;:false,&quot;bg_slider&quot;:false,&quot;keep_padding&quot;:false,&quot;hoverpause&quot;:false,&quot;show_slide_delay&quot;:0}\"  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><ul class='avia-slideshow-inner ' style='padding-bottom: 80.94674556213%;'><li  class='avia-slideshow-slide av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__0  slide-1 slide-odd'><a href=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-1022x1030.jpg\" data-srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-1022x1030.jpg 1022w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-298x300.jpg 298w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-80x80.jpg 80w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-768x774.jpg 768w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-1524x1536.jpg 1524w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-36x36.jpg 36w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-180x180.jpg 180w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-1488x1500.jpg 1488w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-700x705.jpg 700w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2.jpg 1920w\" data-sizes=\"(max-width: 1022px) 100vw, 1022px\"  data-rel='slideshow-2' class='avia-slide-wrap '   ><div class='av-slideshow-caption av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__0 avia-caption'><div class=\"avia-inner-caption\"><div class='avia-caption-content '  itemprop=\"description\" ><p>Colonisation en ville \u00a9 Observatoire des ambroisies<\/p>\n<\/div><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-1422 avia-img-lazy-loading-not-1422\"  src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-845x684.jpg\" width=\"845\" height=\"684\" title='1909_Ambroisie_Lyon-15-scaled' alt=''  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-845x684.jpg 845w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/04\/1909_Ambroisie_Lyon-15-scaled-2-495x400.jpg 495w\" sizes=\"(max-width: 845px) 100vw, 845px\" \/><\/a><\/li><li  class='avia-slideshow-slide av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__1  slide-2 slide-even'><a href=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20200615_Lectoure-Minighin-PhFredon-2-498x1024-1.jpg\" data-srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20200615_Lectoure-Minighin-PhFredon-2-498x1024-1.jpg 498w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20200615_Lectoure-Minighin-PhFredon-2-498x1024-1-146x300.jpg 146w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20200615_Lectoure-Minighin-PhFredon-2-498x1024-1-343x705.jpg 343w\" data-sizes=\"(max-width: 498px) 100vw, 498px\"  data-rel='slideshow-2' class='avia-slide-wrap '   ><div class='av-slideshow-caption av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__1 avia-caption'><div class=\"avia-inner-caption\"><div class='avia-caption-content '  itemprop=\"description\" ><p>Colonisation enter tournesol et bl\u00e9 \u00a9 FREDON Occitanie<\/p>\n<\/div><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-356 avia-img-lazy-loading-not-356\"  src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20200615_Lectoure-Minighin-PhFredon-2-498x1024-1-498x684.jpg\" width=\"498\" height=\"684\" title='20200615_Lectoure-Minighin-PhFredon-2-498x1024' alt=''  itemprop=\"thumbnailUrl\"   \/><\/a><\/li><li  class='avia-slideshow-slide av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__2  slide-3 slide-odd'><a href=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/DSCN0773-1024x768-1.jpg\" data-srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/DSCN0773-1024x768-1.jpg 576w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/DSCN0773-1024x768-1-225x300.jpg 225w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/DSCN0773-1024x768-1-529x705.jpg 529w\" data-sizes=\"(max-width: 576px) 100vw, 576px\"  data-rel='slideshow-2' class='avia-slide-wrap '   ><div class='av-slideshow-caption av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__2 avia-caption'><div class=\"avia-inner-caption\"><div class='avia-caption-content '  itemprop=\"description\" ><p>Colonisation dans un champ de ma\u00efs \u00a9 FREDON Occitanie<\/p>\n<\/div><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-309 avia-img-lazy-loading-not-309\"  src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/DSCN0773-1024x768-1-576x684.jpg\" width=\"576\" height=\"684\" title='Armoise_colonisation' alt=''  itemprop=\"thumbnailUrl\"   \/><\/a><\/li><li  class='avia-slideshow-slide av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__3  slide-4 slide-even'><a href=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-1030x579.jpg\" data-srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-1030x579.jpg 1030w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-300x169.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-768x432.jpg 768w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-1536x864.jpg 1536w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-2048x1152.jpg 2048w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-1500x844.jpg 1500w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-705x397.jpg 705w\" data-sizes=\"(max-width: 1030px) 100vw, 1030px\"  data-rel='slideshow-2' class='avia-slide-wrap '   ><div class='av-slideshow-caption av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__3 avia-caption'><div class=\"avia-inner-caption\"><div class='avia-caption-content '  itemprop=\"description\" ><p>Colonisation dans un champ d&rsquo;ail \u00a9 FREDON Occitanie<\/p>\n<\/div><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-1563 avia-img-lazy-loading-not-1563\"  src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-845x684.jpg\" width=\"845\" height=\"684\" title='20230504_AA_Champ_aillet_topBSV' alt=''  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-845x684.jpg 845w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2023\/05\/20230504_AA_Champ_aillet_topBSV-495x400.jpg 495w\" sizes=\"(max-width: 845px) 100vw, 845px\" \/><\/a><\/li><li  class='avia-slideshow-slide av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__4  slide-5 slide-odd'><a href=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20180619_A-trifide-Montaut-Ariege-19-1024x576-1.jpg\" data-srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20180619_A-trifide-Montaut-Ariege-19-1024x576-1.jpg 1024w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20180619_A-trifide-Montaut-Ariege-19-1024x576-1-300x169.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20180619_A-trifide-Montaut-Ariege-19-1024x576-1-768x432.jpg 768w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20180619_A-trifide-Montaut-Ariege-19-1024x576-1-705x397.jpg 705w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\"  data-rel='slideshow-2' class='avia-slide-wrap '   ><div class='av-slideshow-caption av-li8qdj0e-32d8e03d491f742f790ec28b4a64c6e8__4 avia-caption'><div class=\"avia-inner-caption\"><div class='avia-caption-content '  itemprop=\"description\" ><p>Colonisation en bord de champ \u00a9 FREDON Occitanie<\/p>\n<\/div><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-394 avia-img-lazy-loading-not-394\"  src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/20180619_A-trifide-Montaut-Ariege-19-1024x576-1-845x576.jpg\" width=\"845\" height=\"576\" title='20180619_A-trifide-Montaut-Ari\u00e8ge-19-1024x576' alt=''  itemprop=\"thumbnailUrl\"   \/><\/a><\/li><\/ul><div class='avia-slideshow-arrows avia-slideshow-controls' ><a href='#prev' class='prev-slide  avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='left-open-big' data-av_iconset='svg_entypo-fontello' tabindex='-1' title=\"Pr\u00e9c\u00e9dent\"><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewBox=\"0 0 15 32\" preserveAspectRatio=\"xMidYMid meet\" aria-labelledby='av-svg-title-6' aria-describedby='av-svg-desc-6' role=\"graphics-symbol\" aria-hidden=\"true\">\n<title id='av-svg-title-6'>Pr\u00e9c\u00e9dent<\/title>\n<desc id='av-svg-desc-6'>Pr\u00e9c\u00e9dent<\/desc>\n<path d=\"M14.464 27.84q0.832 0.832 0 1.536-0.832 0.832-1.536 0l-12.544-12.608q-0.768-0.768 0-1.6l12.544-12.608q0.704-0.832 1.536 0 0.832 0.704 0 1.536l-11.456 11.904z\"><\/path>\n<\/svg><span class='avia_hidden_link_text'>Pr\u00e9c\u00e9dent<\/span><\/a><a href='#next' class='next-slide  avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='right-open-big' data-av_iconset='svg_entypo-fontello' tabindex='-1' title=\"Suivant\"><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewBox=\"0 0 15 32\" preserveAspectRatio=\"xMidYMid meet\" aria-labelledby='av-svg-title-7' aria-describedby='av-svg-desc-7' role=\"graphics-symbol\" aria-hidden=\"true\">\n<title id='av-svg-title-7'>Suivant<\/title>\n<desc id='av-svg-desc-7'>Suivant<\/desc>\n<path d=\"M0.416 27.84l11.456-11.84-11.456-11.904q-0.832-0.832 0-1.536 0.832-0.832 1.536 0l12.544 12.608q0.768 0.832 0 1.6l-12.544 12.608q-0.704 0.832-1.536 0-0.832-0.704 0-1.536z\"><\/path>\n<\/svg><span class='avia_hidden_link_text'>Suivant<\/span><\/a><\/div><div class='avia-slideshow-dots avia-slideshow-controls'><a href='#1' class='goto-slide active' >1<\/a><a href='#2' class='goto-slide ' >2<\/a><a href='#3' class='goto-slide ' >3<\/a><a href='#4' class='goto-slide ' >4<\/a><a href='#5' class='goto-slide ' >5<\/a><\/div><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4wnron-7034bf742083afa87282a7ca74985ec2\">\n.flex_column.av-4wnron-7034bf742083afa87282a7ca74985ec2{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-4wnron-7034bf742083afa87282a7ca74985ec2 av_three_fifth  avia-builder-el-33  el_after_av_two_fifth  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-li8pl9n5-5d3d0a691463277c8e74f2aaf303206b '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 id=\"ancre2\">Colonisation et Dispersion sur le territoire<\/h3>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-lh7pglwi-a241780c2c1fbc80e6b53e598a6daf09 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"wpb_text_column wpb_content_element \">\n<p>L\u2019Ambroisie est une plante dite <strong>\u00ab\u00a0pionni\u00e8re\u00a0\u00bb<\/strong>, qui privil\u00e9gie les milieux ouverts peu occup\u00e9s par la v\u00e9g\u00e9tation. Elle tend \u00e0 \u00e9viter la comp\u00e9tition pour l\u2019espace et les ressources (eau, nutriments, \u2026)\u00a0 avec les autres esp\u00e8ces.<\/p>\n<div class=\"wpb_wrapper\">\n<p>Quelles sont les pr\u00e9f\u00e9rences de l&rsquo;Ambroisie :<\/p>\n<ul>\n<li>Elle pr\u00e9f\u00e8re les terrains l\u00e9gers de plein soleil et chaud mais elle peut pousser sur<strong> presque tous types de terrain <\/strong>pourvus qu&rsquo;\u2019ils soient <strong>perturb\u00e9s et d\u00e9nud\u00e9s jusqu\u2019\u00e0 1400m d\u2019altitude<\/strong> : on la retrouve ainsi dans les d\u00e9combres et d\u00e9charges, les champs sur sol riche en \u00e9l\u00e9ments nutritifs, dans les endroits \u00e9clair\u00e9s, chauds et mod\u00e9r\u00e9ment secs, en bord de voirie, sur les bords des cours d\u2019eau, &#8230;etc. De plus, elle va <strong>tr\u00e8s bien r\u00e9sister \u00e0 la s\u00e9cheresse<\/strong>, se mettant en pause avant de poursuivre son cycle au retour de conditions favorables.<\/li>\n<li>Les <strong>terres riches et sableuses<\/strong> mais <strong>tol\u00e8re aussi bien les sols argileux<\/strong> : les terres agricoles pr\u00e9par\u00e9es pour les semis lui sont particuli\u00e8rement favorables. C&rsquo;est pour cela qu&rsquo;on la retrouve de plus en plus dans des <strong>champs de culture de printemps\/\u00e9t\u00e9 (tournesol, soja, parfois ma\u00efs)<\/strong> o\u00f9 elle va poser de nombreux probl\u00e8mes de gestion du fait des <strong>difficult\u00e9s de destruction m\u00e9canique et de ses r\u00e9sistances aux herbicides<\/strong>.<\/li>\n<\/ul>\n<p>Ses capacit\u00e9s de colonisation d&rsquo;un milieu sont donc tr\u00e8s fortes. L&rsquo;ann\u00e9e de sa d\u00e9couverte, <strong>l&rsquo;ambroisie pousse en abondance<\/strong> m\u00eal\u00e9e aux armoises, aux orties, aux ch\u00e9nopodes, aux amarantes et aux \u00e9rigerons dans ses terrains de pr\u00e9dilection. Les ann\u00e9es suivantes, elle peut dispara\u00eetre du fait d&rsquo;un couvert v\u00e9g\u00e9tal germant \u00e0 l&rsquo;automne mais <strong>ses graines stock\u00e9es dans le sol conservent leur capacit\u00e9 de germination pendant plusieurs ann\u00e9es<\/strong> (jusque 10 ans !). L\u2019ambroisie <strong>r\u00e9appara\u00eetra imm\u00e9diatement si une intervention quelconque <\/strong>(culture, travaux, mouvements de terre\u2026)<strong> \u00e9limine le couvert v\u00e9g\u00e9tal.<\/strong> De plus, en retournant la terre soit pour cultiver, soit lors de chantiers, l\u2019homme fait remonter des graines d\u2019ambroisie en surface, permettant ainsi leur germination.<\/p>\n<p>Au del\u00e0 de sa capacit\u00e9 \u00e0 coloniser un milieu, l&rsquo;ambroisie se disperse rapidement :<\/p>\n<ul>\n<li>Le <strong>long des voies de communication humaines<\/strong> (routes, voies ferr\u00e9es, fleuves \u2026) : par exemple, les transports de<strong> terres contamin\u00e9es par les graines<\/strong> ou les moissons et transports de r\u00e9coltes contamin\u00e9es.<\/li>\n<li>Ou <strong>le long des cours d&rsquo;eau<\/strong> qui est donc une dispersion plus spontan\u00e9e<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div><\/section><\/p><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='after_section_2'  class='main_color av_default_container_wrap container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-1383'><div class='entry-content-wrapper clearfix'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-bewqf-0b46dbeeadf0ffa8bf096cc56af7e72c\">\n.flex_column.av-bewqf-0b46dbeeadf0ffa8bf096cc56af7e72c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-bewqf-0b46dbeeadf0ffa8bf096cc56af7e72c av_two_third  avia-builder-el-36  el_after_av_section  el_before_av_one_third  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-li8qmhfx-4eedab358cafb4ce9accfc8618eea232 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 id=\"ancre3\">Surveillance du territoire et R\u00e9glementation<\/h3>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-lh7px9je-ad8605245b25fbeea4df90292b035c48 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>L\u2019envahissement du territoire fran\u00e7ais par ls 3 esp\u00e8ces d&rsquo;Ambroisie constitue <strong>une pr\u00e9occupation de sant\u00e9 publique<\/strong>. Afin de renforcer la coordination des moyens de lutte contre cette plante annuelle allergisante, le Minist\u00e8re charg\u00e9 de la Sant\u00e9 et l\u2019INRAE ont mis en place l\u2019<strong>Observatoire des ambroisies<\/strong> en juin 2011.<\/p>\n<p>L\u2019observatoire met en valeur et favorise les actions efficaces pour un meilleur contr\u00f4le du d\u00e9veloppement de la plante et une <strong>r\u00e9duction de son impact sur la sant\u00e9 et les milieux<\/strong>. Il a \u00e9galement pour t\u00e2che d\u2019encourager la mise en place d\u2019actions de pr\u00e9vention et de lutte, int\u00e9grant \u00e0 la fois la gestion \u00e0 court terme (production de pollen) et la gestion \u00e0 long terme (production de semences) de cette plante envahissante, dans un contexte de respect de r\u00e8gles \u00e9cologiques.<\/p>\n<p>Pour des informations r\u00e9guli\u00e8res, vous pouvez vous <a href=\"https:\/\/especes-risque-sante.info\/newsletter-2\/\" target=\"_blanck\" rel=\"noopener\">inscrire \u00e0 la \u00ab Lettre de l\u2019Observatoire \u00bb<\/a>, lettre d\u2019information sur la situation de l\u2019ambroisie en France.<\/p>\n<p>Un <strong>r\u00e9seau de surveillance de la qualit\u00e9 de l\u2019air<\/strong> par rapport aux quantit\u00e9s de pollens d\u2019ambroisie est \u00e9galement mobilis\u00e9 sur le territoire, et des <strong>bulletins allergopolliniques<\/strong> sont publi\u00e9s r\u00e9guli\u00e8rement pour informer le grand public (<a href=\"https:\/\/www.pollens.fr\/\" target=\"_blanck\" rel=\"noopener\">RNSA \u2013 R\u00e9seau National de Surveillance A\u00e9robiologique<\/a>).<\/p>\n<p><strong>Quelle est la r\u00e9glementation ?<\/strong><\/p>\n<p>La r\u00e9glementation pour la lutte contre les Ambroisies se base sur des <strong>arr\u00eat\u00e9s pr\u00e9fectoraux d\u00e9partementaux<\/strong> pris dans la plupart des d\u00e9partements d&rsquo;Occitanie. Vous pouvez retrouver ces documents sur le <a href=\"https:\/\/ambroisie-risque.info\/reglementation\/\" target=\"_blanck\" rel=\"noopener\">site de l&rsquo;observatoire des ambroisies<\/a>.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2qy23b-b00022741df2d746ffe10f922707770e\">\n.flex_column.av-2qy23b-b00022741df2d746ffe10f922707770e{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-2qy23b-b00022741df2d746ffe10f922707770e av_one_third  avia-builder-el-39  el_after_av_two_third  el_before_av_section  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lh7qc3pr-ed78b768cf8bebef33b5b14c228a9989\">\n.iconbox.av-lh7qc3pr-ed78b768cf8bebef33b5b14c228a9989 .iconbox_icon{\nbackground-color:#b02b2c;\n}\n<\/style>\n<article  class='iconbox iconbox_top av-lh7qc3pr-ed78b768cf8bebef33b5b14c228a9989  avia-builder-el-40  avia-builder-el-no-sibling  main_color'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconbox_content\"><header class=\"entry-content-header\" aria-label=\"Ic\u00f4ne : Que faire si j\u2019observe la pr\u00e9sence de cette plante ?\"><div class='iconbox_icon heading-color avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue81d' data-av_iconfont='entypo-fontello'  ><\/div><div class='iconbox_content_title '  itemprop=\"headline\" >Que faire si j\u2019observe la pr\u00e9sence de cette plante ?<\/div><\/header><div class='iconbox_content_container '  itemprop=\"text\" ><p style=\"text-align: center\"><strong>En cas d\u2019observation de plantes d\u2019ambroisie dans la r\u00e9gion, il faut localiser et signaler rapidement les plantes aux services comp\u00e9tents : la DRAAF-Occitanie et la FREDON Occitanie. <\/strong><\/p>\n<p style=\"text-align: center\">Vous pouvez \u00e9galement signaler la pr\u00e9sence de la plante directement via la plateforme nationale \u00ab\u00a0signalement ambroisie\u00a0\u00bb.<\/p>\n<p><a href=\"https:\/\/signalement-ambroisie.atlasante.fr\/apropos\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-568 size-medium\" src=\"https:\/\/www.fredonoccitanie.com\/ambroisies\/wp-content\/uploads\/sites\/5\/2021\/07\/plateforme_ambroisie-1-300x130.jpg\" alt=\"\" width=\"300\" height=\"130\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/plateforme_ambroisie-1-300x130.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2021\/07\/plateforme_ambroisie-1.jpg 425w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p style=\"text-align: center\"><a href=\"https:\/\/signalement-ambroisie.atlasante.fr\/apropos\" target=\"_blank\" rel=\"noopener\"><em>Cliquez sur l\u2019ic\u00f4ne pour acc\u00e9der \u00e0 la plateforme de signalement<\/em><\/a><\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2uq5s7-c42cc96b8e650536715deab45e69c001\">\n.avia-section.av-2uq5s7-c42cc96b8e650536715deab45e69c001{\nbackground-color:#d1dae6;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_3'  class='avia-section av-2uq5s7-c42cc96b8e650536715deab45e69c001 main_color avia-section-default avia-no-border-styling  avia-builder-el-41  el_after_av_one_third  avia-builder-el-last  avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-1383'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-5w627b-31d33a932253ac34c3a5af39dce51593\">\n.flex_column.av-5w627b-31d33a932253ac34c3a5af39dce51593{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-5w627b-31d33a932253ac34c3a5af39dce51593 av_one_full  avia-builder-el-42  avia-builder-el-no-sibling  first flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-li8vhsve-588fcdb7aa23cf05de6131162eccfb0c\">\n.iconbox.av-li8vhsve-588fcdb7aa23cf05de6131162eccfb0c .iconbox_icon{\nbackground-color:#24992e;\n}\n<\/style>\n<article  class='iconbox iconbox_top av-li8vhsve-588fcdb7aa23cf05de6131162eccfb0c  avia-builder-el-43  avia-builder-el-no-sibling  main_color'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconbox_content\"><header class=\"entry-content-header\" aria-label=\"Ic\u00f4ne : Liens utiles - Les Ambroisies\"><div class='iconbox_icon heading-color avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue82b' data-av_iconfont='entypo-fontello'  ><\/div><div class='iconbox_content_title '  itemprop=\"headline\" >Liens utiles - Les Ambroisies<\/div><\/header><div class='iconbox_content_container '  itemprop=\"text\" ><p id=\"ancre4\" style=\"text-align: center\">Pour plus d&rsquo;informations sur les Ambroisies, consultez <strong>le site de l&rsquo;Observatoire<\/strong> :<\/p>\n<p style=\"text-align: center\"><a href=\"https:\/\/ambroisie-risque.info\/quest-ce-que-lambroisie\/\" target=\"_blanck\" rel=\"noopener\">Qu&rsquo;est-ce que l&rsquo;Ambroisie ? <\/a><br \/>\n<a href=\"https:\/\/ambroisie-risque.info\/ou-se-trouve-lambroisie-en-france\/\" target=\"_blanck\" rel=\"noopener\">O\u00f9 se trouve l&rsquo;Ambroisie ?<\/a><br \/>\n<a href=\"https:\/\/ambroisie-risque.info\/les-risques-pour-la-sante-humaine\/\" target=\"_blanck\" rel=\"noopener\">Les risques pour la sant\u00e9 humaine<\/a><br \/>\n<a href=\"https:\/\/ambroisie-risque.info\/comment-lutter-contre-lambroisie\/#surveillance-des-terres-rapport%C3%A9es\" target=\"_blanck\" rel=\"noopener\">Comment lutter contre l&rsquo;Ambroisie<\/a><br \/>\n<a href=\"https:\/\/ambroisie-risque.info\/outils\/videos-et-photos\/\" target=\"_blanck\" rel=\"noopener\">Photos et Vid\u00e9os sur les Ambroisies<\/a><br \/>\n<a href=\"https:\/\/ambroisie-risque.info\/outils\/documentations\/#1644495566530-a8faf62b-9138\" target=\"_blanck\" rel=\"noopener\">Documentation<\/a><\/p>\n<p style=\"text-align: center\">N&rsquo;h\u00e9sitez pas \u00e0 consulter nos <a href=\"https:\/\/www.fredonoccitanie.com\/ambroisies\/bibliotheque-des-outils-des-ambroisies\/\" target=\"_blanck\">ressources<\/a> : outils de communication, phototh\u00e8que, ressources r\u00e9f\u00e9rents,&#8230;etc.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><\/div><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1383","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/pages\/1383","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/comments?post=1383"}],"version-history":[{"count":5,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/pages\/1383\/revisions"}],"predecessor-version":[{"id":2505,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/pages\/1383\/revisions\/2505"}],"wp:attachment":[{"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/media?parent=1383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}