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2024年冬油菜菌核病防控技術方案

2024-03-21 08:37:21 來源:全國農業技術推廣服務中心 閱讀量:13352 評論

  【農機網 科技創新】 今年2月以來,長江流域冬油菜主產區連續遭遇兩輪大范圍低溫雨雪冰凍天氣過程。尤其是2月下旬低溫持續時間長,冬油菜正處于現蕾抽薹至開花初期,降雪或凍雨等低溫寒潮天氣導致部分油菜葉片受凍、蕾薹結冰、莖桿破裂,生長放緩,抵抗力降低,增加了油菜菌核病感病風險。隨著氣溫回升,田間溫潤條件會進一步促進菌核病菌核提前萌發產生菌絲或者子囊孢子進而侵染油菜莖基部。據國家氣候中心預測,3月份我國江淮南部、江漢東部、江南東北部等地降水量接近常年或偏多2—5成,存在階段性低溫陰雨寡照天氣,增加農田濕度和漬害。油菜成熟期菌核病提早加重發生風險較高。為做好2024年油菜菌核病防控工作,確保油菜生產安全,特制定本方案。
 
  一、防控目標
 
  防控處置率總體達到90%以上,統防統治覆蓋率50%以上,防治效果達到70%以上,危害損失率控制在8%以下。
 
  二、防控策略
 
  采取“預防為主、綜合防控、統防統治”的防控策略。加強田間管理,抓住關鍵時期實施防控,應用無人機等植保高效施藥器械進行統防統治。
 
  三、防控重點及技術措施
 
  (一)分區防控重點
 
  1前期受凍油菜區:湖北、湖南、安徽、河南、江蘇及貴州部分地區油菜受凍較重,注意重點防控。
 
  2.重發區:湖北、湖南、安徽、江蘇、江西、浙江為菌核病重發區,注意重點防控。
 
  3.常發區:重慶、四川、貴州、河南信陽和陜南地區為菌核病常發區,注意關鍵期防控。
 
  4.輕發區:云南、陜西關中、甘肅、青海、新疆和內蒙古等為菌核病輕發區,注意監測,適期防控。
 
  (二)主要技術措施
 
  1.農業防治。一是及時清溝理墑、排澇降濕,確保田間排水順暢、不留漬水,降低田間濕度,抑制菌核萌發。二是追肥調控,促進生長,對發生凍害的田塊,每畝施用3-5公斤尿素和3公斤氯化鉀,增強抗逆性。
 
  2.生物防治。菌核病發生初期,可采用盾殼霉、木霉菌或地衣芽孢桿菌等生物菌劑進行施藥防治。
 
  3.化學防治。對于蕾薹期油菜菌核病,田間明顯可見油菜莖基部感病時,應及時噴施氟唑菌酰羥胺、腐霉利、咪鮮胺等藥劑進行防治,藥液要求噴施到植株莖基部。對于成熟期油菜菌核病,可根據當地實際情況合理安排施藥時間、次數以及配方。在菌核病輕發區和常發區,建議于開花始盛期(田間有50%以上的植株開花)防治一次;在菌核病重發區,建議于初花期和盛花期各防治一次,兩次之間間隔7-10天。藥劑可選用新型殺菌劑氟唑菌酰羥胺、啶酰菌胺或常規殺菌劑咪鮮胺、腐霉利、異菌·氟啶胺等。可添加代森鋅、乙蒜素等兼治細菌性軟腐病;也可添加赤·吲乙·蕓苔、二氫卟吩鐵、13.4%氨基酸水溶肥·生物激活劑水劑、新美洲星等提高油菜抗病抗逆能力。
 
  四、注意事項
 
  一是嚴格按照無人機作業規程進行施藥,建議添加飛防助劑,減少霧滴漂移,提高防治效果。
 
  二是選用對蜜蜂安全的藥劑品種,避免花期施藥對蜜蜂的不良影響。
 
  三是嚴格按照規定劑量和濃度施用農藥,注意輪換用藥以延緩抗性產生。
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