管侧沟茧蜂对不同日龄草地贪夜蛾幼虫的寄生效果  

Parasitic Potential of Microplitis tuberculifer on Spodoptera frugiperda Larvae

作　　者：路子云[1] 杨小凡 马爱红[1] 冉红凡[1] 刘文旭[1] 李建成[1] LU Ziyun;YANG Xiaofan;MA Aihong;RAN Hongfan;LIU Wenxu;LI Jiancheng(Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China,Ministry of Agriculture/IPM Center of Hebei Province/Plant Protection Institute,Hebei Academy of Agricultural and Forestry Sciences,Baoding 071000,China)

机构地区：[1]河北省农林科学院植物保护研究所/河北省农业有害生物综合防治工程技术研究中心/农业部华北北部作物有害生物综合治理重点实验室,保定071000

出　　处：《中国生物防治学报》2020年第4期491-495,共5页Chinese Journal of Biological Control

基　　金：国家重点研发计划(2017YFD0201000);河北省重点研发计划(19226511D);河北省现代农业产业技术体系(HBCT2018100206);河北省农林科学院创新工程(2019-1-1-6)。

摘　　要：为了评价本土幼虫寄生蜂对重大入侵害虫草地贪夜蛾的防控效果,本试验在室内条件下测定了管侧沟茧蜂对不同龄期的草地贪夜蛾幼虫的寄生效果。结果表明,管侧沟茧蜂寄生4日龄和6日龄草地贪夜蛾幼虫的结茧率分别为64.97%和87.01%,显著高于寄生8日龄幼虫的结茧率24.88%;不同日龄草地贪夜蛾幼虫被管侧沟茧蜂寄生后其死亡率有显著差异,4日龄和6日龄草地贪夜蛾幼虫死亡率较低,分别为19.01%和12.99%,8日龄幼虫死亡率最高(62.99%);管侧沟茧蜂寄生4日龄、6日龄、8日龄草地贪夜蛾幼虫后其子代幼虫发育历期分别为8.98、7.71和9.07 d,寄生6日龄幼虫子代幼虫发育历期明显缩短;寄生不同日龄草地贪夜蛾幼虫的子代蜂茧畸形率均较高,且处理间有明显差异。本研究结果为田间利用管侧沟茧蜂有效防治草地贪夜蛾提供了科学依据。The parasitic potential of a native larval parasitic wasp Microplitis tuberculifer(Wesmael) on Spodoptera frugiperda(J.E.Smith) larvae at 4,6 and 8 d after hatching was measured under laboratory conditions.The cocooning rates of M.tuberculifer parasitizing on 4-d-old and 6-d-old S.frugiperda larvae were 64.97% and 87.01%,respectively,significantly higher than that on 8-d-old larvae(24.88%).Significant differences in the mortality of S.frugiperda larvae parasitized by M.tuberculifer were also observed,the highest mortality recorded in the 8-d-old larvae and lower mortalities in 4-d-old and 6-d-old larvae.Larval development durations of M.tuberculifer parasitizing on the 4-,6-and 8-day-old S.frugiperda larvae were 8.98 d,7.71 d and 9.07 d,respectively.The percentage of malformed cocoons on the 4-,6-and 8-day-old S.frugiperda larvae were high,and significant differences were recorded.The results provide a basic information for the effective control of S.frugiperda in the field.

关 键 词：管侧沟茧蜂 草地贪夜蛾 寄生效果 生物防治 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]