Journal of Integrative Agriculture ›› 2024, Vol. 23 ›› Issue (1): 205-216.DOI: 10.1016/j.jia.2023.05.022

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中华甲虫蒲螨寄生显著影响草地贪夜蛾适合度和免疫反应

  

  • 收稿日期:2023-02-16 接受日期:2023-04-21 出版日期:2024-01-20 发布日期:2024-01-06

A mite parasitoid, Pyemotes zhonghuajia, negatively impacts the fitness traits and immune response of the fall armyworm, Spodoptera frugiperda

Yanfei Song1, Tai’an Tian2, Yichai Chen1, Keshi Zhang3, Maofa Yang1, 4, Jianfeng Liu1# #br#   

  1. 1 Institute of Entomology, Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Guizhou University/Scientific Observing and Experiment Station of Crop Pests in Guiyang, Ministry of Agriculture and Rural Affairs, Guiyang 550025, China

    2 Administration of Guizhou Fanjingshan National Nature Reserve, Jiangkou 554400, China

    3 Centre for Biodiversity and Biosecurity, School of Biological Sciences, The University of Auckland, Auckland 1072, New Zealand

    4 College of Tobacco Science, Guizhou University, Guiyang 550025, China

  • Received:2023-02-16 Accepted:2023-04-21 Online:2024-01-20 Published:2024-01-06
  • About author:Yanfei Song, E-mail: yanfeisong1998@126.com, #Correspondence Jianfeng Liu, Tel: +86-851-88305271, E-mail: jfliu3@gzu.edu.cn
  • Supported by:

    This study was funded by the National Natural Science Foundation of China (32060637 and 32260708), the High-level Talent Innovation and Entrepreneurship Funding Project in Guizhou Province, China ((2021)01), the Guizhou Provincial Science and Technology Innovation Talent Team Project, China (Qian Ke He Pingtai Rencai-CXTD (2021)004), the Systematic and Applied Acarology Society International Joint Project, England (2022(01)), the Growth Project of Youth Talent in Ordinary Universities in Guizhou Province, China ((2021)079), and the Natural Science Special Project in Guizhou University, China ((2020)02).

摘要:

寄生性天敌是生态群落中的关键调节因子,已被广泛应用于害虫生物防治中。草地贪夜蛾,俗称秋粘虫,近年来入侵我国,对农业生产造成巨大的经济损失。中华甲虫蒲螨是近年来新发现的一种外寄生螨,在防控多种重大农业害虫中具有很大潜力。因此,本论文研究中华甲虫蒲螨对寄主草地贪夜蛾的寄生潜能,评价中华甲虫蒲螨亚致死密度对草地贪夜蛾亲代和子代适合度,及其对寄主细胞免疫和体液免疫的影响。结果表明,40头中华甲虫蒲螨能致死5龄草地贪夜蛾幼虫。因多数草地贪夜蛾幼虫能存活至成虫期并交配产出后代,5头和10头中华甲虫蒲螨寄生被认为能对寄主造成亚致死效应。中华甲虫蒲螨亚致死密度寄生能降低草地贪夜蛾蛹重、羽化率和产卵量,并延长其发育历期和寿命。10头和40头中华甲虫蒲螨寄生能破坏草地贪夜蛾的细胞免疫和体液免疫。本研究首次证实寄生螨寄生能对寄主免疫反应产生负面影响。此外,该研究还揭示了寄生螨的生防潜能及其与寄主的相互作用关系。

Abstract:

Parasitoids are key regulators in ecological communities and widely used as agents in biocontrol programmes.  The fall armyworm, Spodoptera frugiperda, recently invaded multiple continents and caused substantial economic losses in agriculture.  Pyemotes zhonghuajia, a newly identified mite parasitoid, has shown potential for controlling various agricultural insect pests.  Therefore, this study tested the performance of Pzhonghuajia in parasitising S. frugiperda.  We also investigated the sublethal effects of parasitism by Pzhonghuajia on host fitness traits, transgenerational impacts, and cellular and humoral immunity.  Our result showed that the fifth-instar larvae of Sfrugiperda parasitised by 40 Pzhonghuajia were all dead (i.e., a lethal effect), while parasitism by 5 or 10 Pzhonghuajia was considered sublethal since many Sfrugiperda survived to adulthood and produced offspring after mating.  The sublethal influences from parasitism by Pzhonghuajia resulted in reduced pupal weight, adult emergence rate and fecundity, but increased developmental time and longevity.  Parasitism at both lethal (40 mites) and sublethal (10 mites) levels impaired the cellular and humoral immunity of Sfrugiperda.  This study presents the first empirical evidence that mite parasitoids can negatively influence host immunity.  Moreover, it provides insights into the biocontrol potential of mite parasitoids and their interactions with hosts.

Key words: Pyemotes zhonghuajia ,  Spodoptera frugiperda ,  immunity ,  parasitic-induced influence ,  biocontrol ,  parasitoid