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麥田雜草春季化除意見

2023-02-16 11:06:58 來源: 江蘇省揚州市農業農村局 閱讀量:22314 評論

  【農機網 熱點關注】近期隨著氣溫回升,江蘇省揚州市邗江區小麥即將進入返青拔節期,也是麥田雜草防控的關鍵期。各鎮(街道、園區)要高度重視,指導農戶搶抓氣溫回升后晴好天氣,根據田間草相,選擇對路、優質、安全的除草劑品種,及時開展麥田雜草春季化除工作,有效控制麥田雜草危害,為夏糧豐產豐收打好基礎。
 
  一、雜草發生情況
 
  近期調查,雜草達標率33.33%,達標面積3.37萬畝:其中禾本科草達標率為12.96%,闊葉草達標率為14.81%;雜草密度:禾本科草量平均21.4萬株/畝(0-270萬株/畝),闊葉草草量平均2.4萬株/畝(0-21萬株/畝)。當前田間雜草以禾本科雜草為主(看麥娘、日本看麥娘、菵草等),闊葉雜草主要有豬殃殃、牛繁縷、巢菜、薺菜等。隨著氣溫回升和春季出草高峰的到來,田間草量將會進一步上升。
 
  二、防治意見
 
  (一)防治策略:根據草相選準藥劑,抓住時機合理施藥。
 
  (二)防治時間:2月中旬到3月中旬(小麥拔節前),天氣晴好且氣溫穩定在5℃以上及時進行防治。
 
  (三)防治方法:
 
  1.以禾本科雜草為主的田塊可使用唑啉草酯、啶磺草胺、甲基二磺隆、唑啉·炔草酯、氟唑·炔草酯、氟唑磺隆·甲基二磺隆、甲基二磺隆·異丙隆、氟唑·異丙隆、環吡·異丙隆等藥劑。日本看麥娘發生重的田塊,宜使用啶磺草胺。已拔節田塊須用唑啉草酯。
 
  2.以闊葉雜草為主的田塊可使用氯氟吡氧乙酸、2甲4氯、2甲·雙氟、雙氟·氟氯酯、啶磺·氟氯酯、氟吡·雙氟等藥劑。薺菜發生較重的田塊可使用苯磺隆+2甲4氯鈉鹽于小麥拔節前施用。
 
  3.禾本科、闊葉雜草混生的田塊可使用甲基二磺隆+異丙隆+氯氟吡氧乙酸異辛酯。已拔節田塊須用唑啉草酯+氯氟吡氧乙酸異辛酯。
 
  以上藥劑在使用時必須嚴格遵照藥劑登記量使用,可兌水20kg彌霧或兌水40kg噴霧。
 
  (四)注意事項:
 
  1.為避免產生藥害,已拔節小麥田禁用甲基二磺隆和異丙隆,大麥田禁用精噁唑禾草靈,氯氟吡氧乙酸不可與苯醚甲環唑混用,炔草酯、唑啉草酯等不可與激素類除草劑混用;為確保后茬作物安全,所有麥田禁用綠、甲磺隆復配劑。
 
  2.建議在冷尾暖頭、晴好天氣中午氣溫較高時施藥,提高防治效果。在強寒流前后、氣溫5℃以下,易出現凍藥害,不能開展防治工作。
 
  3.施藥時避免藥劑飄到敏感作物上,施藥器械用后應及時清洗。
 
  4.農藥包裝廢棄物必須回收,不得隨意丟棄。
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