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麥田雜草春季化除意見(jiàn)

2023-02-16 11:06:58 來(lái)源： 江蘇省揚(yáng)州市農(nóng)業(yè)農(nóng)村局 閱讀量：22325 評(píng)論

　　【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】近期隨著氣溫回升，江蘇省揚(yáng)州市邗江區(qū)小麥即將進(jìn)入返青拔節(jié)期，也是麥田雜草防控的關(guān)鍵期。各鎮(zhèn)(街道、園區(qū))要高度重視，指導(dǎo)農(nóng)戶(hù)搶抓氣溫回升后晴好天氣，根據(jù)田間草相，選擇對(duì)路、優(yōu)質(zhì)、安全的除草劑品種，及時(shí)開(kāi)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(chǎn)豐收打好基礎(chǔ)。
 
　　一、雜草發(fā)生情況
 
　　近期調(diào)查，雜草達(dá)標(biāo)率33.33%，達(dá)標(biāo)面積3.37萬(wàn)畝：其中禾本科草達(dá)標(biāo)率為12.96%，闊葉草達(dá)標(biāo)率為14.81%；雜草密度：禾本科草量平均21.4萬(wàn)株/畝(0-270萬(wàn)株/畝)，闊葉草草量平均2.4萬(wàn)株/畝(0-21萬(wàn)株/畝)。當(dāng)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(lái)，田間草量將會(huì)進(jìn)一步上升。
 
　　二、防治意見(jiàn)
 
　　(一)防治策略：根據(jù)草相選準(zhǔn)藥劑，抓住時(shí)機(jī)合理施藥。
 
　　(二)防治時(shí)間：2月中旬到3月中旬(小麥拔節(jié)前)，天氣晴好且氣溫穩(wěn)定在5℃以上及時(shí)進(jìn)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(huán)吡·異丙隆等藥劑。日本看麥娘發(fā)生重的田塊，宜使用啶磺草胺。已拔節(jié)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(fā)生較重的田塊可使用苯磺隆+2甲4氯鈉鹽于小麥拔節(jié)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(jié)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(shí)必須嚴(yán)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(xiàng)：
 
　　1.為避免產(chǎn)生藥害，已拔節(jié)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(huán)唑混用，炔草酯、唑啉草酯等不可與激素類(lèi)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(fù)配劑。
 
　　2.建議在冷尾暖頭、晴好天氣中午氣溫較高時(shí)施藥，提高防治效果。在強(qiáng)寒流前后、氣溫5℃以下，易出現(xiàn)凍藥害，不能開(kāi)展防治工作。
 
　　3.施藥時(shí)避免藥劑飄到敏感作物上，施藥器械用后應(yīng)及時(shí)清洗。
 
　　4.農(nóng)藥包裝廢棄物必須回收，不得隨意丟棄。

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