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玉米田苗后莖葉除草技術

2024-06-12 08:41:43 來源：黑龍江省農業農村廳 閱讀量：18739 評論

　　【農機網 熱點關注】 玉米田苗后莖葉除草最佳施藥時期為玉米3-5葉期，雜草2-4葉期，此時施藥對玉米安全，對雜草防除效果好。各地要根據本地區氣候、土壤特點、作物布局、耕作條件、田間雜草種群及雜草抗性程度等條件綜合分析，因地制宜，合理制定用藥方案和作業參數，對于土壤濕度適宜地區、地塊，適時開展苗后莖葉除草，避免產生飄移藥害。
 
　　具體配方：
 
　　(1)田間雜草種類較少，且以禾本科雜草為主的地塊，在玉米3-5葉期，禾本科雜草5葉期前用硝磺草酮+煙嘧磺隆+莠去津莖葉噴霧，能取得較好的防除效果。
 
　　(2)以野黍、狗尾草等為主地塊，應盡可能在玉米3-5葉期，最遲不能超過8葉期用苯唑草酮或苯唑氟草酮+莠去津+植物油助劑莖葉噴霧處理。
 
　　(3)田間雜草較多，且稗草發生量較大的地塊，在玉米3-5葉期使用環磺酮+莠去津莖葉噴霧處理。苘麻發生較多的地塊選用含辛酰溴苯腈配方。
 
　　注意事項：
 
　　(1)施藥前應查看天氣預報，如未來三天內有低于12℃低溫時段，應延后施藥，避免產生藥害。
 
　　(2)玉米苗后除草劑煙嘧磺隆、硝磺草酮使用前一周和使用后一周不能使用有機磷類殺蟲劑，以免產生藥害。
 
　　(3)鮮食爆裂玉米對煙嘧磺隆較敏感，應避免使用；硝磺草酮、苯唑草酮需小面積試用取得經驗后使用。

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