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2024—2025年度油菜全生育期病蟲害防控技術方案

2024-12-02 08:59:55 來源:全國農技推廣中心 閱讀量:19937 評論

  【農機網 科技創新】 做好油菜全生育期病蟲害防控是提升油菜單產的重要措施之一。受病原菌累積和氣候等因素影響,近年來,菌核病在各油菜種植區持續加重為害,根腫病在長江流域發生范圍持續擴大,跳甲、猿葉甲等害蟲在長江流域冬油菜區及北方、青藏高原油菜產區為害加重。據氣象預測,今冬我國大部地區氣溫較常年同期偏高,中東部大部降水偏少,局部地區降水明顯偏多,適宜地下害蟲、蚜蟲、苗期立枯病、猝倒病發生為害;冬季過程性降溫將增加油菜菌核病、黑脛病等病害感病風險。為加強油菜全生育期病蟲害防控工作,提高防控效果,減輕危害損失,夯實油菜豐收基礎,全國農技中心特制定本方案。
 
  防控策略
 
  堅持“預防為主、綜合防治”的植保方針,采取“關口前移、治早治小”的防控策略,緊盯油菜播種期、苗期、蕾薹期、花期和青角期等病蟲害預防控制關鍵時期,綜合采用生態調控、理化誘控、生物防治、科學用藥等技術措施,合理施用殺蟲劑、殺菌劑及植物生長調節劑,實現防病蟲控危害和提單產有機統一。
 
  防控對象
 
  長江中下游及南方三熟制油菜產區:包括上海、浙江、安徽、江蘇、江西、湖北、湖南、河南南部等區域,主要為冬油菜區,重點防控菌核病、根腫病、立枯病(根腐病)、霜霉病、蚜蟲、猿葉甲等,兼顧白粉病、黑脛病、黑斑病、黑腐病和地下害蟲、菜青蟲、小菜蛾、跳甲等病蟲。
 
  長江上游和云貴高原油菜產區:包括云南、貴州、重慶、四川、陜西漢中和安康地區等區域,主要為冬油菜區,重點防控菌核病、根腫病、蚜蟲、跳甲等,兼顧白銹病、白粉病、霜霉病、病毒病和地下害蟲、菜青蟲、小菜蛾、葉甲等病蟲。
 
  北方和青藏高原油菜產區:包括河北、山西、內蒙古、山東部分地區、河南中北部、陜西中北部以及甘肅、青海、新疆、西藏等區域,既有冬油菜,也有春油菜,重點防控菌核病、黑脛病、白粉病、油菜角野螟、跳甲等,兼顧白銹病、霜霉病、黑斑病和小菜蛾、菜青蟲、歐洲粉蝶、甜菜夜蛾、蚜蟲、葉甲、莖象甲等病蟲。
 
  防控措施
 
  (一)油菜播種期
 
  一是選種和種子處理。因地制宜選種耐密、高產、抗倒、抗(耐)病的優質高效的油菜品種。根腫病重發區可選種華油雜62R、華油雜5R、華油雜115R、圣光165R、中油926等抗(耐)性品種,并適當推遲播種期。北方和青藏高原油菜產區選種抗寒(凍)、耐旱、抗病、豐產的強冬性品種。可選用在油菜上登記的種衣劑進行種子包衣或拌種,減輕苗期病蟲為害。
 
  二是輪作和土壤處理。條件適宜地區實行水旱輪作,或與大麥、小麥等禾本科作物輪作倒茬,有效減少田間病原菌菌源量以及蟲源基數,減輕油菜病蟲害的發生程度。菌核病重發區,可選用生物菌劑進行土壤處理,根腫病常發區可使用石灰氮(氰氨化鈣)進行土壤處理,減少田間菌源量。
 
  (二)油菜苗期
 
  重點防治蚜蟲、霜霉病、猿葉甲、立枯病、根腫病、菌核病等病蟲,北方和青藏高原油菜產區還要防治白銹病、黃曲條跳甲、油菜莖象甲等病蟲。在合理施用殺蟲劑、殺菌劑防控病蟲害的同時,增施植物生長調節劑提高油菜抗病抗逆能力,植物生長調節劑可選用蕓苔素內酯、二氫卟吩鐵、糠氨基嘌呤、多效唑等。
 
  油菜蚜蟲達到百株500頭時進行施藥防治,可選用金龜子綠僵菌CQMa421生物制劑或溴氰菊酯、噻蟲嗪等藥劑噴霧。當田間明顯可見猿葉甲幼蟲時,可選用辛硫磷等藥劑進行兼治。菜青蟲、小菜蛾等鱗翅目害蟲發生區域應在幼蟲三齡前及時施藥防治。可選用魚藤酮、噻蟲嗪等防治跳甲類害蟲。
 
  立枯病在田間發現零星病株后,應及時施藥防治,控制蔓延。霜霉病病株率達20%的田塊,可選用乙蒜素、代森鋅等噴霧。菌核病發生田塊可在局部進行藥劑防治,有條件的地區可選用盾殼霉等生物制劑,及時進行苗期預防,抑制菌核萌發,減輕花期防控壓力。根腫病發生區,可使用生物菌肥、生根劑、免疫誘抗劑等,提高植株抗逆性,田間發現病株時應及時拔除離田銷毀。
 
  (三)油菜蕾苔期
 
  蕾薹期重點防治蚜蟲、預防病毒病,兼治菌核病、霜霉病等。北方和青藏高原油菜產區還要關注白粉病、白銹病、菜青蟲等病蟲。抓好油菜蕾薹期病蟲害防控能有效實現病蟲防控關口前移,壓低花角期病蟲發生基數。同時,可噴施二氫卟吩鐵、氨基酸水溶肥、新美洲星有機水溶肥等增強油菜抗逆抗病蟲能力。
 
  當田間明顯可見蚜蟲危害時應及時進行防治,預防病毒病發生流行。蚜蟲可選用金龜子綠僵菌CQMa421生物制劑或溴氰菊酯、噻蟲嗪等。菌核病常年重發區或出現秋苗發病區域,田間明顯可見莖基部感染時應采用全株噴霧方式及時防治,藥液要求能夠接觸到油菜植株莖基部和地表土壤,殺滅土壤中已經萌發的菌絲和形成的子囊盤,藥劑可選用氟唑菌酰羥胺、腐霉利、咪鮮胺等。霜霉病重發田塊可添加代森鋅、乙蒜素等兼治。
 
  (四)油菜花期
 
  重點防治菌核病,兼治白粉病、白銹病等病害。北方和青藏高原油菜產區還要關注霜霉病、小菜蛾、蚜蟲和預防缺硼引起的花而不實。施藥時可向藥液中添加具有增效作用的磷酸二氫鉀、硫肥、速效硼等,以及植物生長調節劑,落實“一促四防”。
 
  菌核病重發區全面落實油菜開花始盛期(油菜主莖開花率達80%左右、一次分枝開花株率50%左右)的藥劑預防,如遇連陰雨、花期持續時間長等適宜病害發生流行天氣,盛花期(75%的油菜枝梗已開花)須進行第二次藥劑預防。藥劑可選用氟唑菌酰羥胺、啶酰菌胺、腐霉利、咪鮮胺、異菌脲等藥劑,以及盾殼霉或芽孢桿菌等生物菌劑。霜霉病病株率達20%時,可選用乙蒜素乳油、代森錳鋅噴霧。百株蚜蟲量達到500頭時可選用噻蟲嗪、溴氰菊酯等藥劑均勻噴霧施藥,兼治其它害蟲。
 
  (五)油菜青角期
 
  重點挑治蚜蟲、白粉病、黑斑病、白銹病等。北方和青藏高原油菜產區還要重點防治角野螟、歐洲粉蝶、甜菜夜蛾、蚜蟲等。
 
  當田間有蚜枝率達到10%以上時施藥防治。田間白粉病、黑斑病發病株率達到20%,且天氣條件適宜時,可噴施氟唑菌酰羥胺等進行兼治。油菜霜霉病病株率達20%以上時選用合適藥劑噴藥防治,連續噴施1—2次,兼治其他病害。其他蟲害可選用金龜子綠僵菌CQMa421生物制劑、阿維菌素乳油、或溴氰菊酯、噻蟲嗪等化學藥劑噴霧,連續噴施1—2次。
 
  注意事項
 
  一是注意科學用藥。選用三證齊全、質量合格的對路藥劑,嚴格按照規定劑量和濃度科學施用,做到打準時期、用足藥量、科學混配、交替用藥。植保無人機施藥時,每畝用水量不低于1.5升,并添加沉降劑。
 
  二是注意保護蜜蜂。油菜花期施藥時要避免使用噻蟲嗪等新煙堿類藥劑,以防影響蜜蜂采蜜安全。
 
  三是注意抗性治理。要加強抗性監測和治理,已產生抗藥性的地區要改用其它藥劑,如菌核病等病菌對苯并咪唑類藥劑產生抗藥性,要停用多菌靈等藥劑,提高防效。
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