{"id":44451,"date":"2024-10-23T16:44:34","date_gmt":"2024-10-23T14:44:34","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&#038;p=44451"},"modified":"2024-10-23T16:44:34","modified_gmt":"2024-10-23T14:44:34","slug":"megastigmus-spermotrophus-ravageur-de-graines-de-douglas-et-ses-ennemis-naturels-en-wallonie","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/megastigmus-spermotrophus-ravageur-de-graines-de-douglas-et-ses-ennemis-naturels-en-wallonie\/","title":{"rendered":"Megastigmus spermotrophus, ravageur de graines de douglas, et ses ennemis naturels en Wallonie"},"content":{"rendered":"<p>Megastigmus spermotrophus est un ravageur de graines d\u2019origine am\u00e9ricaine introduit accidentellement en Europe avec son h\u00f4te le sapin de Douglas (Pseudotsuga menziensii). Les ravages occasionn\u00e9s par la larve de cet insecte dans les r\u00e9coltes de graines r\u00e9duisent significativement les r\u00e9coltes de graines en peuplements d\u2019\u00e9lite ou en vergers \u00e0 graines. De nombreux travaux men\u00e9s tant en Belgique que dans la plupart des pays d\u2019Europe mettent en \u00e9vidence un taux de destruction de semences viables variant de 5 \u00e0 90 % en France, de 2 \u00e0 15 % en Am\u00e9rique, 100 % en Pologne, de 5 \u00e0 70 % en Belgique. Megastigmus spermotrophus est parasit\u00e9 par divers hym\u00e9nopt\u00e8res partout en Wallonie ; cependant ces ennemis naturels semblent \u00eatre actuellement trop peu nombreux pour effectuer un contr\u00f4le efficace.<\/p>","protected":false},"excerpt":{"rendered":"<p>Megastigmus spermotrophus est un ravageur de graines d\u2019origine am\u00e9ricaine introduit accidentellement en Europe avec son h\u00f4te le sapin de Douglas (Pseudotsuga menziensii). Les ravages occasionn\u00e9s par la larve de cet insecte dans les r\u00e9coltes de graines r\u00e9duisent significativement les r\u00e9coltes de graines en peuplements d\u2019\u00e9lite ou en vergers \u00e0 graines. De nombreux travaux men\u00e9s tant [&hellip;]<\/p>","protected":false},"featured_media":0,"template":"","categories":[49],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Megastigmus spermotrophus, ravageur de graines de douglas, et ses ennemis naturels en Wallonie - For\u00eat.Nature<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/foretnature.be\/en\/article-foret-nature\/megastigmus-spermotrophus-ravageur-de-graines-de-douglas-et-ses-ennemis-naturels-en-wallonie\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Megastigmus spermotrophus, ravageur de graines de douglas, et ses ennemis naturels en Wallonie - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Megastigmus spermotrophus est un ravageur de graines d\u2019origine am\u00e9ricaine introduit accidentellement en Europe avec son h\u00f4te le sapin de Douglas (Pseudotsuga menziensii). Les ravages occasionn\u00e9s par la larve de cet insecte dans les r\u00e9coltes de graines r\u00e9duisent significativement les r\u00e9coltes de graines en peuplements d\u2019\u00e9lite ou en vergers \u00e0 graines. 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