曲纹紫灰蝶在铜仁的发生及防治

目的]为了防治铜仁地区的曲纹紫灰蝶。方法]2005~2006年对曲纹紫灰蝶造成的危害进行初步调查,并寻找有效的防治措施。结果]苏铁的被害株率高达34%,受害严重植株虫口密度高达173头/株;为害高峰期为苏铁第一批新羽叶抽生时期的5月下旬至6月上旬;受害严重的植株当年抽生的羽叶全部枯死;曲纹紫灰蝶防治的关键时期应掌握在每年苏铁第1个抽芯盛期用药防治;采取压前控后的防治措施。结论]该研究为该地区防治曲纹紫灰蝶提供了依据。

Occurrence and Control ofChilades pandavain Tongren Area

Objective] The research aimed to control Chilades pandava in Tongren area.Method] The damages caused by C.pandava were surveyed preliminarily in 2005～2006 to seek the effective controlling measures.Result] The damaged plant rate of Cycas revoluta Thunb reached 34% and population density of severely damaged plants reached 173 /plant.Harming peak stage was the formation stage of the first batch of leatherleaves in C.revoluta from late May to early June.The leatherleaves produced in current year in the plants that were damaged severely all withered to death.As for the key stage of controlling C.pandava,the drug control should be mastered in the bloom stage of first core growing out in C.revolute every year.Controlling measures of early pressing and late controlling should be taken.Conclusion] The research provided basis for controlling C.pandava in this area.