淡足侧沟茧蜂对草地贪夜蛾的寄生功能反应  

Functional response of Microplitis pallidipes parasitizing Spodoptera frugiperda

作　　者：王金彦 万年峰[1] 范能能 蒋杰贤[1] WANG Jin-Yan;WAN Nian-Feng;FAN Neng-Neng;JIANG Jie-Xian(Eco-environmental Protection Research Institute,Shanghai Academy of Agricultural Sciences,Shanghai 201403,China)

机构地区：[1]上海市农业科学院生态环境保护研究所,上海201403

出　　处：《应用昆虫学报》2020年第6期1319-1325,共7页Chinese Journal of Applied Entomology

基　　金：上海市农业科学院卓越团队建设项目(2018[B-01])。

摘　　要：【目的】评估淡足侧沟茧蜂Microplitispallidipes对入侵昆虫草地贪夜蛾Spodopterafrugiperda的控制作用。【方法】观察5个温度下淡足侧沟茧蜂对草地贪夜蛾幼虫的寄生功能反应、搜寻效应和自身密度干扰反应。【结果】在20、23、26、29和32℃条件下,淡足侧沟茧蜂对幼虫的寄生功能反应均符合HollingⅡ型方程;同一温度下,淡足侧沟茧蜂寄生量随寄主密度增加而增加,当寄主密度增加到一定水平后,寄生量趋于平稳;淡足侧沟茧蜂的寄生效能受温度影响,29℃的寄生效能最大,而20℃的最小;淡足侧沟茧蜂搜寻效应,随寄主密度和淡足侧沟茧蜂自身密度的增加而逐渐降低;Hessell-Varley干扰模型模拟发现,淡足侧沟茧蜂数量增加致使搜寻效应值减小、搜索效率降低。【结论】温度影响淡足侧沟茧蜂对草地贪夜蛾的寄生作用,且该蜂个体之间的干扰效应降低了其寄生效能。[Objectives]To evaluate the effectiveness of parasitism by Microplitis pallidipes Szepligetion on Spodoptera frugiperda(J.E.Smith)larvae.[Methods]We studied the functional response,search rate and effect of intraspecific competition,on the parasitism rate of M.pallidipes on S.frugiperda larvae at five different temperatures(20,23,26,29 and 32℃),in a laboratory.[Results]The functional response of M.pallidipeson fitted a Holling type II model at all five temperatures.At the same temperature,the parasitism rate increased with host density up to a certain level after which it tended to stabilize.The parasitic efficiency of M.pallidipes was affected by temperature.The parasitic efficiency(a/Th)was highest at 29℃and lowest at 20℃.Search effectiveness gradually decreased with increasing density of both the host species and M.pallidipe.Simulation with the Hessell-varley model suggests that both search effect and search efficiency decrease with increasing density of parasitic wasps.[Conclusion]Temperature affects parasitism by M.pallidipes on S.frugiperda and intraspecific competition between M.pallidipes reduced the parasitism rate.

关 键 词：草地贪夜蛾 淡足侧沟茧蜂 功能反应 搜寻效应 干扰效应 温度 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]