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梨实蜂以幼虫危害梨花及幼果,造成严重落花落果。梨星毛虫也是以幼虫危害梨和苹果的花芽及叶片。本试验在梨实蜂和梨星毛虫危害的关键时期,采用不同的药剂、浓度和时期进行防治,试图找出较好的药剂、浓度和防治时期,以达到经济有效的目的。于1982年进行试验,1983—1986年进行了示范推广,取得了较好的经济效益。
Pear bee pests harm pear and young fruit, causing serious drop flowers. Pear caterpillar is also a pear and apple damage by larvae flower buds and leaves. In this critical period, the pear, Apis cerana cerana and Cinnabar caterpillar were treated with different agents, concentrations and time to try to find out the better agent, concentration and control period in order to reach the goal of economy and efficiency. Experiments were conducted in 1982 and demonstrations were carried out in 1983-1986 with good economic benefits.