草地贪夜蛾寄生蜂螟蛉盘绒茧蜂的个体发育  

Ontogeny of Cotesia ruficrus,a Parasitoid of Spodoptera frugiperda

作　　者：何朋阳 李贤 刘同先[1] 张世泽[1] HE Pengyang;LI Xian;LIU Tongxian;ZHANG Shize(State Key Laboratory of Crop Stress Biology for Arid Areas/College of Plant Protection,Northwest A&F University,Yangling 712100,China)

机构地区：[1]西北农林科技大学植物保护学院/旱区作物逆境生物学国家重点实验室,杨凌712100

出　　处：《中国生物防治学报》2023年第6期1488-1494,共7页Chinese Journal of Biological Control

基　　金：陕西省重点研发计划(2021NY-038);国家重点研发计划(2017YFD0201006)。

摘　　要：草地贪夜蛾自2019年入侵我国以来,已对我国农业生产和粮食安全构成了严重威胁。挖掘、筛选和评估本地天敌资源,对开展草地贪夜蛾生物防治具有重要意义。2020年在陕西省玉米主产区开展草地贪夜蛾及其天敌资源调查时首次发现被螟蛉盘绒茧蜂寄生的草地贪夜蛾幼虫,这也是我国首次报道本地寄生蜂螟蛉盘绒茧蜂寄生草地贪夜蛾幼虫。本文详细报道了螟蛉盘绒茧蜂的个体发育史和各个发育阶段的发育历期,以期为今后利用螟蛉盘绒茧蜂开展草地贪夜蛾生物防治提供参考。螟蛉盘绒茧蜂的个体发育包括卵、幼虫、蛹和成虫。卵有柄,发育3 d后孵化为幼虫;幼虫3龄,1龄幼虫具有角质化的颚,2龄幼虫具有发达的尾囊,3龄幼虫尾囊退化;3龄幼虫咬破寄主体壁爬出体外并就近结茧化蛹;化蛹3 d后即羽化为成虫。螟蛉盘绒茧蜂卵期3.1 d,1龄幼虫期2.1 d,2龄幼虫期3.2 d,3龄幼虫期1.0 d,蛹期3.0 d,卵~成虫发育历期12.4 d。The fall armyworm,Spodoptera frugiperda(Lepidoptera:Noctuidae),is a major invasive pest worldwide.Since its invasion into China in 2019,S.frugiperda has posed a serious threat to China’s agricultural production and food security.It is of great importance to excavate,screen and evaluate domestic dominant natural enemy resources for the biological control of this insect pest.In 2020,the larvae of S.frugiperda parasitized by Cotesia ruficrus were first collected in the main corn producing areas of Shaanxi Province,and this is also the first report in China that the native parasitoid C.ruficrus parasitizes S.frugiperda larvae.In this paper,the ontogenetic history and developmental time of C.ruficrus were reported in detail to aid the development of biological control program of S.frugiperda by utilizing C.ruficrus in the future.The developmental stages of C.ruficrus include egg,larva,pupa and adult.The egg has a stalk and hatches 3 days after oviposition.The larva has three instars;the 1st instar larva has keratinized jaws;the 2^(nd) instar larva has developed tail sacs;and the 3^(rd) instar larva has degenerated tail sacs.The 3^(rd) instar larva bits through body wall of S.frugiperda larva and climbs out from S.frugiperda larva,and cocoons and pupates nearby.The pupa emerges 3 days after pupation.The mean developmental durations of egg,first instar,second instar,third instar,pupa,and egg-adult of C.ruficrus are 3.1 d,2.1 d,3.2 d,1.0 d,3.0 d,and 12.4 d,respectively.

关 键 词：螟蛉盘绒茧蜂 草地贪夜蛾 个体发育 寄生蜂 生物防治 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]