问:
芸豆的豆荚螟如何防治呢? 可用50%辛硫磷1000倍液,或21﹪灭杀毙4000倍液,或40%氰戊菊酯6000倍液,或80%敌敌畏800倍液喷洒,隔7~10天喷1次,药液要均匀喷洒在植株叶片、花蕾、嫩荚上。 |
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