{"id":4146,"date":"2022-06-30T20:21:27","date_gmt":"2022-06-30T20:21:27","guid":{"rendered":"https:\/\/parrishandheimbecker-ag.com\/dealing-with-tar-spot-in-2022\/"},"modified":"2026-01-29T22:59:41","modified_gmt":"2026-01-29T22:59:41","slug":"dealing-with-tar-spot-in-2022","status":"publish","type":"post","link":"https:\/\/parrishandheimbecker-ag.com\/fr\/dealing-with-tar-spot-in-2022\/","title":{"rendered":"Traiter la tache goudronneuse en 2022"},"content":{"rendered":"

On a beaucoup parl\u00e9 de la tache goudronneuse au cours des deux derni\u00e8res ann\u00e9es, et pour de bonnes raisons. Cette maladie a migr\u00e9 du sud de la fronti\u00e8re et s\u2019est propag\u00e9e dans le sud de l\u2019Ontario par les vents. La tache goudronneuse (selon le moment de l\u2019infection) peut priver une r\u00e9colte de ma\u00efs jusqu\u2019\u00e0 60 % de son rendement potentiel. Cette maladie continue non seulement \u00e0 se propager depuis les \u00c9tats-Unis, mais elle peut \u00e9galement hiverner sur les tiges et dans le sol.<\/p>\n

Le plus grand potentiel d\u2019infection provient des spores hivernantes. Si vous avez d\u00e9tect\u00e9 une infection en 2021, il existe un risque non seulement pour les champs voisins, mais elle infectera \u00e9galement le ma\u00efs spontan\u00e9 de la culture de soja\/haricots comestibles suivante. Un contr\u00f4le pr\u00e9coce du ma\u00efs spontan\u00e9 est essentiel pour r\u00e9duire la charge en spores du sol. Dans un sc\u00e9nario de culture de ma\u00efs sur ma\u00efs, qui pr\u00e9sente le plus grand risque, le d\u00e9pistage est essentiel pour supprimer et g\u00e9rer la tache goudronneuse. L\u2019utilisation de fongicides en culture est indispensable pour r\u00e9duire l\u2019impact sur le rendement.<\/p>\n

La tache goudronneuse se reconna\u00eet \u00e0 des l\u00e9sions noires sur\u00e9lev\u00e9es sur la plante, qui ne peuvent pas \u00eatre \u00e9tal\u00e9es ou essuy\u00e9es comme la rouille ou les excr\u00e9ments d\u2019insectes, et qui traversent jusqu\u2019\u00e0 l\u2019autre face de la feuille. Lorsque la plante est infect\u00e9e, la d\u00e9composition des tissus est rapide et l'infection typique co\u00efncide avec la formation des panicules au stade de reproduction et lorsque la plante essaie de produire un \u00e9pi. La d\u00e9t\u00e9rioration de la plante s\u2019acc\u00e9l\u00e8re lorsque la production de chlorophylle est interrompue au moment m\u00eame o\u00f9 la plante puise dans ses r\u00e9serves de nutriments pour assurer le remplissage des grains. Ainsi, l'int\u00e9grit\u00e9 de la tige ainsi que la profondeur et le poids du noyau sont au mieux inf\u00e9rieurs \u00e0 la moyenne.<\/p>\n

Gr\u00e2ce \u00e0 la collaboration de l'industrie des deux c\u00f4t\u00e9s de la fronti\u00e8re, une application mobile a \u00e9t\u00e9 cr\u00e9\u00e9e pour suivre les conditions m\u00e9t\u00e9orologiques, les pr\u00e9cipitations, l'humidit\u00e9 et la temp\u00e9rature qui permettront in\u00e9vitablement de pr\u00e9dire si la tache goudronneuse sera une pr\u00e9occupation et quand la d\u00e9tecter. Vous pouvez le trouver en recherchant \u00ab Tarspotter \u00bb dans l\u2019App Store. Il s\u2019agit d\u2019une application conviviale qui peut aider \u00e0 att\u00e9nuer les pertes de production.<\/p>\n

Si vous avez des questions concernant cette \u00ab nouvelle \u00bb maladie et si la tache goudronneuse est une pr\u00e9occupation dans votre r\u00e9gion, veuillez contacter votre agronome P&H local pour en discuter et obtenir des informations sur les fongicides les mieux adapt\u00e9s pour lutter contre la tache goudronneuse.<\/p>\n

TROUVEZ UN EMPLACEMENT PR\u00c8S DE CHEZ VOUS<\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"

On a beaucoup parl\u00e9 de la tache goudronneuse au cours des deux derni\u00e8res ann\u00e9es, et…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"2176,2126,3752,2049,2050,2382","_relevanssi_noindex_reason":"","footnotes":""},"categories":[15],"tags":[],"class_list":["post-4146","post","type-post","status-publish","format-standard","hentry","category-east"],"acf":[],"yoast_head":"\nTraiter la tache goudronneuse en 2022 | P&H Agriculture<\/title>\n<meta name=\"robots\" content=\"index, follow, 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