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8月大热,此时,一些病虫害为了躲避高温恶劣天气,出现越夏现象,如栾多态毛蚜在6月底7月初出现大量滞育蚜,草履蚧雌成虫将卵产于土中越夏等等。一些病虫害经过长期的环境适应,在8月酷暑时,已发育到一定的阶段,能够抵抗高温环境,如藤壶蚧、红蜡蚧的若虫此时身体上覆盖了一层蜡,天牛的卵大多已孵化,幼虫已钻蛀入植物内部等等。对于防治工作来
August heat, at this time, some pests and diseases in order to avoid high temperature and bad weather, the phenomenon of summer, such as the Luan polymorphicola aphid in late June and early July a large number of diapause aphids, grasshopper female adult eggs in the soil in the summer and so on Wait. Some pests and diseases after a long period of environmental adaptation, in the heat of August, has developed to a certain stage, able to resist high temperature environment, such as rattan scale, red scale scale nymph body covered with a layer of wax, Most have hatched, the larvae have drilled into the interior of the plant and so on. For prevention and control work