山西省不同地区梨小食心虫发生及防治

梨小食心虫在山西一年发生３～４代，其中大同地区为３代；忻州、太原、太谷、临汾、长治为４代。各代发生期由北至南有一定的提前。在前三代蛾量高峰期后３～４ｄ进行药剂防治，防效可达９０％以上。

Occurrence and Control of Oriental Fruit Moth in Different Regions of Shanxi Province

Oriental fruit moth usually occures 3～4 generations a year in Shanxi province. In Datong, the moth had 3 generations, but 4 generations in Xinzhou, Taiyuan, Taigu, Linfen and Changzi. The occurrence times were increasing from north to south. Insecticide control was made after 3～4 days of occurring peak period of oriental fruit moth. Relative efficacy was>90% as compared with control.