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Performance and preference of larval parasitoid, Microplitis pallidipes (Hymenoptera: Braconidae), on 2 Spodoptera pest species

文献类型： 外文期刊

作者： Xu, Wei 1 ; Lyu, Baoqian 2 ; Yan, Sanqiang 2 ; Song, Yaoyao 3 ; Tang, Jihong 3 ; Zhou, Xiaojuan 3 ; Wang, Chongtian 4 ;

作者机构： 1.Guizhou Univ, Natl Key Lab Green Pesticide, Key Lab Green Pesticide & Agr Bioengn, Minist Educ,Ctr R&D Fine Chem, Guiyang 550025, Peoples R China

2.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Key Lab Integrated Pest Management Trop Crops, Minist Agr & Rural Affairs, Haikou 571101, Peoples R China

3.Chinese Acad Trop Agr Sci, Sanya Res Inst, Hainan Key Lab Biosafety Monitoring & Mol Breeding, Sanya 572025, Peoples R China

4.Sanya Longhua Ecol Agr Technol Co Ltd, Sanya 572000, Peoples R China

关键词： parasitoid; host selectivity; life table; pest control

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.2； 五年影响因子：2.3 ）

ISSN： 0022-0493

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) and Spodoptera litura (Fabricius) are the main pests on corn (Poaceae: Gramineae). The performance of the larval wasp, Microplitis pallidipes Sz & eacute;pligeti (Hymenoptera: Braconidae), was reported on S. frugiperda and S. litura. In this study, we evaluated host selectivity, constructed an age-stage, 2-sex life table, and assessed the pest control potential of M. pallidipes against these 2 pests under laboratory conditions. In a 2-choice host preference experiment, M. pallidipes exhibited a stronger preference for S. frugiperda over S. litura and a distinct preference for second instars. We also investigated the parasitism of females that were either unfed or fed with 10% honey-water solution under different host densities and found that the highest parasitism rate was observed when M. pallidipes were fed with honey-water solution on the first day after mating and a presented female wasp:host ratio of 1:90. In a nonselective assay, M. pallidipes successfully completed a full generation on both hosts. However, the parasitoids exhibited higher fitness and population growth potential when reared on S. frugiperda, with a net reproductive rate (R0) of 24.24, an intrinsic rate of increase (r) of 0.20 per day, a finite rate of increase (lambda) of 1.23 per day, and a mean generation time (T) of 15.69 days. This study elucidates the performance of M. pallidipes on 2 Spodoptera host species and offers insights into its biological control potential on lepidopteran pests. Graphical Abstract

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