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白菜生青虫怎么办
更新时间: 2022-03-12 11:15:36  

1、物理防治:可采用性诱剂诱杀。或每50亩地设黑光灯一盏,诱杀成虫。

2、药剂防治:卵孵高峰期至低龄幼虫始盛期,幼虫尚未蛀入果内前用药,药剂可选用1%威克达乳油3000~4000倍,或48%乐斯本乳油1000倍液,或5.7%天王百树乳油1500倍液,或Bt乳剂250倍液等,喷雾防治。

3、农业防治:翻耕、整枝、摘除虫果,早、中、晚熟品种搭配开种植,田内种植玉米诱集带,诱蛾产卵。

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