Answer: Combine biological and chemical prevention methods can be used for prevention and treatment. Protect parasitoids and attract woodpeckers. In autumn and winter, about 30% of larvae and cockroaches are eaten by woodpeckers. Artificial control, the use of adult feign death, artificial capture of landing of the adult; spraying control, apple small Giardia serious orchard, should be based on the prevention and treatment of larvae, during the adult period of continuous spraying, can be used to kill 20% Chrysanthemum emulsifiable concentrate 2000 times, 40% chlorpyrifos 2000 times and other agents.
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