城市银杏大蚕蛾的生物学及综合治理研究

银杏大蚕蛾Ｄｉｓｔｙｏｐｌｏｃａ Ｊａｐｏｎｉｃａ Ｂｕｔｌｅｒ在南充城市生态环境中，年发生１代，以滞育卵越冬，滞育期６个多月。雌雄幼虫均７个龄期，１－３龄有群集为害习性，６－７龄为暴食期，高度分散，造成严重危害。雌成虫无孤雌生殖现象，平均产卵２９６．５粒。采用人工采蛹及卵堆，保护天敌，在１－３龄期用农药局部挑治等综合治理措施，即可将该虫长期控制在无害状态。

STUDIES ON THE BIONOMICS OF DISTYOPLOCA JAPONICA BUTLER AND ITS INTEGRATED MANAGEMENT IN URBAN ECOTOPE

In the present study,Distyoploca japanica Butler,a leafeating insect attacking city ornamentalplants,was found to have one generation in a year in the ecological environment of Nanchong,Sichuan.Its diapausing eggs hibernated on the trunks or main braches of the host plants.Thediapausing period lasted as long as six months.Both male and female larvae had seven instar stages;1 to 3 instar larvae fed in groups and 6 Or 7 instar larvae showed a greedy appite and werehighly scattered.No parthenogenesis was noticed a mong the female adults,each of which laid296.5 eggs in average,Manual clearing of its pupae and eggs lumps,protecting its naturalenemiets,closely monitoring its development,selectively spraying the host trees severely affectd andother IPM measures were effective in keeping the pest under control.