1．施药时尽量避开下雨天如农作物必须进行施药，也要在下雨前8小时完成施药工作。2．选用内吸性强的农药象氧化乐果、久效磷、甲胺磷、多菌灵、托布津、粉锈宁等农药具有内吸性，药液通过作物茎对吸收后，能迅速传导到植株各个部位，药效受降雨影响较小。1605、甲基1605、敌百 1. As far as possible to avoid spraying rainy days, such as crops must be applied, but also to complete the pesticide application 8 hours before the rain. 2. Use strong absorption of pesticides such as omethoate, monocrotophos, methamidophos, carbendazim, thiophanate, triadimefon and other pesticides have systemic absorption of liquid through the stems after absorption, can quickly transfer to the plant each Parts, efficacy less affected by rainfall. 1605, methyl 1605, enemy hundred