南华松叶蜂生物学习性观察及防治试验

南华松叶蜂在贵州平坝1 a发生2代,以老熟幼虫在萤内越冬,第1代幼虫于7～8月取食2年生松针造成局部性危害,幼虫有群集习性,便于人工防治。据室内人工饲养观察,幼虫期受姬蜂及寄蝇寄生,其寄生率高居40%～88%,表明通过充分运用天敌因素,可以实现害虫的自然控制。

Preliminary study on biological characteristics and control of Diprion nanhuaensis Xiao

In Pingba county of Guizhou province,two generations of Diprion nanhuaensis Xiao occur each year.This pest overwinters in older larval stage in the cocoon.From July to August,the larva of first generation emerge and feed on 2-year-old needles,and cause sporadical damage in the orchard.The larva usually live in a group and therefore it is helpful for artificial control.According to the results of the indoor rearing observation,up to 40%-88% of the larva were parasitized by members of Ichneumonidae and Tachinidae,which indicated the great potential of natural control of the pest by protection and application of natural enemies.