河北省魏县是我国梨著名产区 ,为了提高梨果品质 ,近年来大力推广梨果套袋栽培技术 ,但套袋梨的黄粉虫发生普遍 ,受害严重 ,一般受害率 10 %～ 30 % ,危害较重梨园虫果率 60 %～ 80 % ,严重减产减收。目前市场上销售的农药大多渗透性不好 ,对入袋的黄粉虫防效较差 ,且杀虫迟缓 Weixian County, Hebei Province, is a famous pear producing area in China. In order to improve the quality of pears and popularize pear bagging cultivation techniques in recent years, bagged pests of Tenebrio occur frequently and suffer serious damage, with the rate of 10% -30% Harm heavy pear fruit rate of 60% to 80%, a serious cut production. Pesticides currently on the market mostly impermeable to the penetration of Tenebrio poor control, and insecticidal slow