{"id":27049,"date":"2025-09-11T16:28:13","date_gmt":"2025-09-11T14:28:13","guid":{"rendered":"https:\/\/www.irbab-kbivb.be\/?p=27049"},"modified":"2025-09-11T16:29:28","modified_gmt":"2025-09-11T14:29:28","slug":"la-teigne-signalee","status":"publish","type":"post","link":"https:\/\/www.irbab-kbivb.be\/fr\/la-teigne-signalee\/","title":{"rendered":"La Teigne signal\u00e9e"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27031\" src=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1-1024x576.jpg\" alt=\"\" width=\"810\" height=\"456\" srcset=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1-1024x576.jpg 1024w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1-300x169.jpg 300w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1-768x432.jpg 768w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1-1536x864.jpg 1536w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1-810x456.jpg 810w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1-1140x641.jpg 1140w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-1.jpg 2016w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/a><\/p>\n\n\n\n<p>La teigne (<em>Scrobipalpa ocellatella<\/em>) est un petit papillon de nuit dont les larves peuvent endommager les betteraves. Les papillons pondent leurs \u0153ufs en \u00e9t\u00e9, et c\u2019est \u00e0 cette p\u00e9riode qu\u2019il est possible d\u2019observer les d\u00e9g\u00e2ts caus\u00e9s par les larves. Ce ravageur a immigr\u00e9 depuis les pays du Sud, ce qui explique pourquoi davantage de sympt\u00f4mes sont signal\u00e9s cette ann\u00e9e qui est chaude et s\u00e8che.<\/p>\n<p>Comment reconna\u00eetre la larve de la teigne :<\/p>\n<ul>\n<li>Galeries profondes dans le c\u0153ur de la betterave et les p\u00e9tioles des feuilles. Parfois, les p\u00e9tioles sont brunis \u00e0 la base, avec \u00e9ventuellement une larve dans la galerie.<\/li>\n<li>D\u00e9coloration du c\u0153ur et des feuilles centrales : elles deviennent brunes\/noires, se dess\u00e8chent et peuvent pourrir. Des petites crottes noires (excr\u00e9ments) sont visibles dans le c\u0153ur de la plante.<\/li>\n<li>Pr\u00e9sence de fils de soie possible dans le c\u0153ur de la betterave.<\/li>\n<li>Galeries dans le c\u0153ur pouvant entra\u00eener des infections secondaires provoquant la pourriture des racines.<\/li>\n<li>Apparence de la larve : au premier stade, la larve est grise (comme montr\u00e9 sur les photos ci-dessous) et devient rouge\u00e2tre au dernier stade larvaire avant de se transformer en papillon. Elles sont souvent difficiles \u00e0 voir car elles se nourrissent \u00e0 l\u2019int\u00e9rieur des p\u00e9tioles ou du c\u0153ur de la betterave.<\/li>\n<\/ul>\n<p>Pour l\u2019instant, aucune intervention n\u2019est n\u00e9cessaire, mais il est important de savoir reconna\u00eetre les sympt\u00f4mes et le ravageur.<\/p>\n<p><a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27035\" src=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1-1024x576.jpg\" alt=\"\" width=\"810\" height=\"456\" srcset=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1-1024x576.jpg 1024w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1-300x169.jpg 300w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1-768x432.jpg 768w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1-1536x864.jpg 1536w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1-810x456.jpg 810w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1-1140x641.jpg 1140w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-2.2-1.jpg 1600w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/a><\/p>\n\n\n\n<p>Les feuilles du c\u0153ur et le c\u0153ur de la betterave prennent une couleur brun \u00e0 noir, avec des dommages dus au grignotage \u00e0 la base des p\u00e9tioles. Les blessures peuvent se dess\u00e9cher, parfois avec formation de nouvelles feuilles du c\u0153ur. Si des champignons p\u00e9n\u00e8trent par ces blessures, la pourriture des racines peut survenir.<\/p>\n<p>\u00a0<\/p>\n<p><a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27037\" src=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2-1024x756.jpg\" alt=\"\" width=\"810\" height=\"598\" srcset=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2-1024x756.jpg 1024w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2-300x221.jpg 300w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2-768x567.jpg 768w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2-1536x1134.jpg 1536w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2-810x598.jpg 810w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2-1140x841.jpg 1140w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-3.2.jpg 1920w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/a><\/p>\n\n\n\n<p>Larve de teigne qui cherche son chemin apr\u00e8s \u00eatre sortie d\u2019un p\u00e9tiole. Elle n\u2019a pas encore creus\u00e9 de galeries profondes dans la racine, mais elle a encore plusieurs stades de croissance \u00e0 traverser, au cours desquels elle provoquera encore des d\u00e9g\u00e2ts.<\/p>\n<p>\u00a0<\/p>\n<p><a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27051\" src=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2-1024x768.jpg\" alt=\"\" width=\"810\" height=\"608\" srcset=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2-1024x768.jpg 1024w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2-300x225.jpg 300w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2-768x576.jpg 768w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2-1536x1152.jpg 1536w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2-810x608.jpg 810w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2-1140x855.jpg 1140w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/09\/Bietenmot-4.2.jpg 1920w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/a><\/p>\n\n\n\n<p>Larve en dernier stade de d\u00e9veloppement. Attention \u00e0 son corps ray\u00e9 de rouge, contrairement \u00e0 la jeune larve grise sur la photo ci-dessus. Une fois qu\u2019elle se transformera en papillon, elle ne causera plus de d\u00e9g\u00e2ts.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La teigne (Scrobipalpa ocellatella) est un petit papillon de nuit dont les larves peuvent endommager les betteraves. Les papillons pondent leurs \u0153ufs en \u00e9t\u00e9, et c\u2019est \u00e0 cette p\u00e9riode qu\u2019il est possible d\u2019observer les d\u00e9g\u00e2ts caus\u00e9s par les larves. Ce ravageur a immigr\u00e9 depuis les pays du Sud, ce qui explique pourquoi davantage de sympt\u00f4mes [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":27031,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":8,"footnotes":""},"categories":[222],"tags":[243],"class_list":["post-27049","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ravageurs","tag-messages"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La Teigne signal\u00e9e - IRBAB-KBIVB<\/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:\/\/www.irbab-kbivb.be\/fr\/la-teigne-signalee\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La Teigne signal\u00e9e - IRBAB-KBIVB\" \/>\n<meta property=\"og:description\" content=\"La teigne (Scrobipalpa ocellatella) est un petit papillon de nuit dont les larves peuvent endommager les betteraves. Les papillons pondent leurs \u0153ufs en \u00e9t\u00e9, et c\u2019est \u00e0 cette p\u00e9riode qu\u2019il est possible d\u2019observer les d\u00e9g\u00e2ts caus\u00e9s par les larves. 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