{"id":21168,"date":"2021-04-29T15:59:51","date_gmt":"2021-04-29T13:59:51","guid":{"rendered":"https:\/\/www.irbab-kbivb.be\/?p=21168"},"modified":"2021-04-29T16:40:51","modified_gmt":"2021-04-29T14:40:51","slug":"toutes-les-betteraves-semees-stress-du-au-froid-pas-toujours-visible","status":"publish","type":"post","link":"https:\/\/www.irbab-kbivb.be\/fr\/toutes-les-betteraves-semees-stress-du-au-froid-pas-toujours-visible\/","title":{"rendered":"Toutes les betteraves sem\u00e9es, stress d\u00fb au froid pas toujours visible"},"content":{"rendered":"\n

\"\"<\/a>Au d\u00e9but de cette semaine environ 97% des betteraves \u00e9taient sem\u00e9es.<\/p>\n

Les betteraves ont subi une longue p\u00e9riode de froid au cours de jours et semaines pass\u00e9es. Des d\u00e9g\u00e2ts de gels sont signal\u00e9s dans 10% des 99 parcelles observ\u00e9es. Les cotyl\u00e9dons de certaines vari\u00e9t\u00e9s sont parfois d\u2019une couleur rouge fonc\u00e9, ainsi que les nervures et jeunes premi\u00e8res feuilles. Cette couleur provient de la pr\u00e9sence de pigments, des anthocyanes, et est g\u00e9n\u00e9tiquement fix\u00e9 dans les vari\u00e9t\u00e9s. Lors de conditions stressantes, tel un froid intense, la production de ces anthocyanes peut augmenter. Cette coloration ne meut en aucun cas \u00eatre li\u00e9 \u00e0 une plus ou moins forte sensibilit\u00e9 de la vari\u00e9t\u00e9 au froid. Ce ph\u00e9nom\u00e8ne n\u2019est pas non plus li\u00e9 \u00e0 une attaque parasitaire.<\/p>\n

Quelques parcelles sem\u00e9es la semaine avant P\u00e2ques ont une lev\u00e9e finale excellente. 26% des 124 parcelles ont \u00e9t\u00e9 sem\u00e9es apr\u00e8s la p\u00e9riode de froid. A l\u2019exception d\u2019une parcelle, la lev\u00e9e n\u2019a pas encore d\u00e9but\u00e9 dans ces parcelles. En g\u00e9n\u00e9ral, 26% des parcelles pr\u00e9sentent une lev\u00e9e sup\u00e9rieure \u00e0 85%, 27% des parcelles ont une lev\u00e9e entre 60 et 85%, et 19% des parcelles ont une lev\u00e9e actuellement inf\u00e9rieure \u00e0 \u00a060%. Des comptages de lev\u00e9e n\u2019ont pas \u00e9t\u00e9 effectu\u00e9s dans 28% des parcelles car sem\u00e9es plus tardivement. Suivez le d\u00e9veloppement des cultures via la carte \u00ab\u00a0Lev\u00e9e betterave\u00a0<\/a>\u00bb.<\/p>\n","protected":false},"excerpt":{"rendered":"

Au d\u00e9but de cette semaine environ 97% des betteraves \u00e9taient sem\u00e9es. Les betteraves ont subi une longue p\u00e9riode de froid au cours de jours et semaines pass\u00e9es. Des d\u00e9g\u00e2ts de gels sont signal\u00e9s dans 10% des 99 parcelles observ\u00e9es. Les cotyl\u00e9dons de certaines vari\u00e9t\u00e9s sont parfois d\u2019une couleur rouge fonc\u00e9, ainsi que les nervures et […]<\/p>\n","protected":false},"author":3,"featured_media":21156,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":0,"footnotes":""},"categories":[2,206],"tags":[243],"class_list":["post-21168","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-betterave","category-developpement-cultural","tag-messages"],"yoast_head":"\nToutes les betteraves sem\u00e9es, stress d\u00fb au froid pas toujours visible - 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\/toutes-les-betteraves-semees-stress-du-au-froid-pas-toujours-visible\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Toutes les betteraves sem\u00e9es, stress d\u00fb au froid pas toujours visible - IRBAB-KBIVB\" \/>\n<meta property=\"og:description\" content=\"Au d\u00e9but de cette semaine environ 97% des betteraves \u00e9taient sem\u00e9es. Les betteraves ont subi une longue p\u00e9riode de froid au cours de jours et semaines pass\u00e9es. Des d\u00e9g\u00e2ts de gels sont signal\u00e9s dans 10% des 99 parcelles observ\u00e9es. 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