梨实蝇(Chaetodacus ferr ugineus Fabricius)是桂西水果的主要害虫之一,该虫在桂西的百色地区12个县均有发生,主要危害沙梨、芒果、桃、番石榴等果实。一般年份,这些果实的受害率在40％左右,重者可达80％以上,对水果产量造成严重的损失。过去有些地方曾用喷洒农药或用糖醋液诱杀成虫等方法进行防治,但其效果都不显著。为了减轻梨实蝇危害的损失,有些单位或果 Chaetodacus ferr ugineus Fabricius is one of the main pests of fruit in western Guangxi. The insects occur in 12 counties of Baise in western Guangxi, and mainly endanger pear, mango, peach, guava and other fruits. In general years, the damage rate of these fruits is about 40%, and the severe ones can reach more than 80%, causing serious losses to the fruit yield. In the past, some places used to spray pesticides or trapping insects with sugar vinegar and other methods of prevention and treatment, but the effect is not significant. In order to reduce the harm of pear fruit flies, some units or fruit