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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2020年57 No.6

Functional response of Microplitis pallidipes parasitizing Spodoptera frugiperda
Author of the article:WANG Jin-Yan WAN Nian-Feng FAN Neng-Neng JIANG Jie-Xian
Author's Workplace:Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China;Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China;Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China;Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Key Words:invading insect; Spodoptera frugiperda; functional response; searching effect; parasitic efficiency; temperature
Abstract:
[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.
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