{"id":4871,"date":"2026-02-24T14:20:19","date_gmt":"2026-02-24T13:20:19","guid":{"rendered":"https:\/\/www.fredonoccitanie.com\/eesh\/?p=4871"},"modified":"2026-02-24T16:05:58","modified_gmt":"2026-02-24T15:05:58","slug":"ophraella-les-recherches-continuent","status":"publish","type":"post","link":"https:\/\/www.fredonoccitanie.com\/eesh\/2026\/02\/24\/ophraella-les-recherches-continuent\/","title":{"rendered":"[OPHRAELLA] Les recherches continuent&#8230;"},"content":{"rendered":"<p>Une exp\u00e9rimentation sur la <strong>capacit\u00e9 d\u2019hivernation des Ophraella<\/strong> dans trois zones g\u00e9ographiques au climat contrast\u00e9 en France est en cours.<\/p>\n<div id=\"attachment_4872\" style=\"width: 235px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4872\" class=\"size-medium wp-image-4872\" src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-225x300.jpg 225w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-773x1030.jpg 773w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-768x1024.jpg 768w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-1152x1536.jpg 1152w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-1536x2048.jpg 1536w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-1125x1500.jpg 1125w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-529x705.jpg 529w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_mejannes_haut2-scaled.jpg 1920w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><p id=\"caption-attachment-4872\" class=\"wp-caption-text\">Les sacs d\u00e9pos\u00e9s en octobre ont pass\u00e9 la saison sans dommages. M\u00e9jannes-le-Clap (30) \/garrigue<\/p><\/div>\n<p>Bien que leur naturalisation en Europe et en France montre qu\u2019elles sont capables de passer l\u2019hiver dans les conditions climatiques rencontr\u00e9es (sous forme adulte en s\u2019enfouissant dans le sol ou dans des refuges herbac\u00e9s), l\u2019INRAE de Sophia-Antipolis \u00e9tudie de fa\u00e7on plus fine <strong>l\u2019impact des conditions d\u2019hivernation sur leur taux de survie et de reproduction<\/strong>.<\/p>\n<p>Pour cela, des adultes pr\u00eats \u00e0 hiverner ont \u00e9t\u00e9 enferm\u00e9s dans des sacs en tissu avec 2 substrats (sol ou foin), et d\u00e9pos\u00e9s au sol en plusieurs lieux. Pour la modalit\u00e9 climat m\u00e9diterran\u00e9en, 10 sites ont \u00e9t\u00e9 choisis, 6 dans le Gard et 4 en Vaucluse. D\u00e9pos\u00e9s mi-octobre 2025, ces sacs ont \u00e9t\u00e9 relev\u00e9s fin f\u00e9vrier 2026.<\/p>\n<div id=\"attachment_4873\" style=\"width: 310px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4873\" class=\"size-medium wp-image-4873\" src=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_saintvictor1-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_saintvictor1-300x225.jpg 300w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_saintvictor1-1030x773.jpg 1030w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_saintvictor1-768x576.jpg 768w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_saintvictor1-1536x1152.jpg 1536w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_saintvictor1-2048x1536.jpg 2048w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_saintvictor1-1500x1125.jpg 1500w, https:\/\/www.fredonoccitanie.com\/eesh\/wp-content\/uploads\/sites\/5\/2026\/02\/20260217_saintvictor1-705x529.jpg 705w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-4873\" class=\"wp-caption-text\">Relev\u00e9 \u00e0 Saint-Victor (30), le 17\/02\/2026<\/p><\/div>\n<p>Les <strong>comptages et mises en condition de reproduction sur des ambroisies en laboratoire sont en cours<\/strong>. Les r\u00e9sultats de cette 2<sup>\u00e8me<\/sup> exp\u00e9rimentation d\u2019hivernation feront l\u2019objet d\u2019un chapitre de la th\u00e8se de Zo\u00e9 Rousset et viendront compl\u00e9ter les connaissances de la biologie d\u2019Ophraella pour d\u00e9terminer les capacit\u00e9s d\u2019\u00e9tablissement de l\u2019insecte et mieux comprendre la dynamique des populations afin de pr\u00e9dire les performances de l\u2019insecte \u00e0 contr\u00f4ler les populations d\u2019ambroisie.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une exp\u00e9rimentation sur la capacit\u00e9 d\u2019hivernation des Ophraella dans trois zones g\u00e9ographiques au climat contrast\u00e9 en France est en cours. Bien que leur naturalisation en Europe et en France montre qu\u2019elles sont capables de passer l\u2019hiver dans les conditions climatiques rencontr\u00e9es (sous forme adulte en s\u2019enfouissant dans le sol ou dans des refuges herbac\u00e9s), l\u2019INRAE [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":4603,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,2],"tags":[],"class_list":["post-4871","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-ambroisies","category-actualites-fredon"],"_links":{"self":[{"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/posts\/4871","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/comments?post=4871"}],"version-history":[{"count":5,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/posts\/4871\/revisions"}],"predecessor-version":[{"id":4882,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/posts\/4871\/revisions\/4882"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/media\/4603"}],"wp:attachment":[{"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/media?parent=4871"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/categories?post=4871"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fredonoccitanie.com\/eesh\/wp-json\/wp\/v2\/tags?post=4871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}