药浸袋口可有效防治套袋梨黄粉虫辛集市从１９９１年开始鸭梨套袋栽培，套袋可明显地改善果品外观，降低农药残留，提高果园经济效益，但套袋栽培也造成一些病虫防治难度加大，且有逐年加重之势。特别是梨黄粉虫，１９９６年有１０％的梨园因梨黄粉虫发生严重而被迫解袋，... Medicine dip bag can effectively prevent bagging pear Tenebrio Xinji City since 1991, pear bagging culture, bagging can significantly improve the appearance of fruits, reduce pesticide residues and improve the economic benefits of orchards, but bagging also caused some diseases Pest control more difficult, and there is a trend of increasing year by year. In particular, pear mealworms, 10% of pear orchard in 1996 due to serious occurrence of pear mealworms and forced bagging, ...