摘要
对微红绒茧峰在田间不同代别菜青虫在时间和数量上的控制能力进行模糊综合评判。结果表明，粉红绒茧蜂（以下简称微蜂）对菜青虫的控制作用时间为菜青虫幼虫１～４龄，微蜂可以在菜青虫幼虫５龄暴食期之前将其致死并减轻危害。微峰对不同代别菜青虫种群作用的量也不同，对２～４代菜青虫控制能力的顺序为３代＞２代＞４代。其综合控制指数分别为０．３４０、０．２２８、０．１６３。模糊综合评判的方法能较好地揭示微蜂对菜青虫的控制时期及作用大小。
The parasitic stadium and controlling ability of Apanteles rubecula Marshall to Pieris rapae L. were evaluated by using fuzzy method. The results show that the larvae of cabbage butterfly can be controlled in the early stage (1 to 4 star )by Wasp, Apanteles rubecula Marshau which could killed the larvae before 5 star and retrieced a ecomomic loss in a large scale. Therefore, wasp has different controlling abilityin different genenations in the field. The intergated controlling indexe of Znd,3rd,4th. genemations is 0.228, 0.340, 0. 163, the controlling order is 3rd, 2nd, 4th genernations.
出处
《莱阳农学院学报》
1994年第2期122-125,共4页
Journal of Laiyang Agricultural College
关键词
综合评判
微红绒茧蜂
菜青虫
寄生
Fuzzy method, Apanteles rubecula Marshall
parasitic ability
