草地贪夜蛾卵寄生蜂——夜蛾黑卵蜂的种内识别及过寄生  

Intraspecific Host Discrimination and Superparasitism in Telenomus remus(Nixon),an Egg Parasitoid of Spodoptera frugiperda(J.E.Smith)

作　　者：薛陶然 潘静 刘丽红 徐腾 黄建 何玉仙[2] 王竹红 XUE Taoran;PAN Jing;LIU Lihong;XU Teng;HUANG Jian;HE Yuxian;WANG Zhuhong(State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/College of Plant Protection,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Institute of Plant Protection,Fujian Academy of Agricultural Sciences,Fuzhou 350013,China)

机构地区：[1]福建农林大学植物保护学院/闽台作物有害生物生态防控国家重点实验室,福州350002 [2]福建省农业科学院植物保护研究所,福州350013

出　　处：《中国生物防治学报》2024年第1期1-11,共11页Chinese Journal of Biological Control

基　　金：福建省自然科学基金(2021J01064);国家重点研发计划(2017YFD0201000)。

摘　　要：夜蛾黑卵蜂是重大入侵害虫草地贪夜蛾的重要卵期寄生蜂。为明确夜蛾黑卵蜂的种内识别及过寄生现象,测定了夜蛾黑卵蜂对被同种自体(同一个体)或异体(不同个体)雌蜂寄生不同时间间隔后的寄主卵的识别能力,并研究了单头和多头雌蜂在不同寄主密度下的过寄生率。结果发现,无论自体或异体寄生识别,夜蛾黑卵蜂的过寄生率均为0。单头雌蜂在不同蜂卵比下寄生24 h后,寄主卵内寄生蜂1龄幼虫的百分比均小于100%,且每粒寄主卵内只有1头1龄幼虫。多头雌蜂在寄主数量充足条件下,当蜂卵比为1:100、2:200、4:400、6:600、8:800时,未被寄生的寄主卵的百分比分别为52.8%、67.2%、63.2%、53.6%和51.2%,含1头寄生蜂1龄幼虫的寄主卵的百分比分别为47.2%、32.8%、36.8%、46.4%和48.8%;多头雌蜂在寄主数量不足条件下,当蜂卵比为2:20、3:21、4:20、7:21、20:20时,夜蛾黑卵蜂的寄生率分别为60.0%、83.0%、95.0%、94.0%和96.0%,过寄生率分别为11.0%、38.0%、64.0%、73.0%和92.0%;单粒寄主卵内寄生蜂1龄幼虫的平均数量分别为0.4、0.6、1.1、1.3和2.1头,最大数量分别为3.0、4.0、5.0、6.0和12.0头。结果表明,夜蛾黑卵蜂具有自体和异体寄生识别能力;单头雌蜂的过寄生率与寄主数量无关;多头雌蜂在寄主数量充足的条件下,不会产生过寄生;但在寄主数量不足的条件下,随着蜂卵比升高,寄生率、过寄生率、单粒草地贪夜蛾卵内寄生蜂1龄幼虫的平均数和最大数均随之增加。蜂卵比为4:20时寄生率高,过寄生率低,内部竞争低,是较为合适的接蜂比例。Telenomus remus(Nixon)is an important egg parasitoid of Spodoptera frugiperda(J.E.Smith),a major invasive pest.In order to clarify the intraspecific host discrimination and the superparasitism of T.remus,the self-recognition(same individual)and conspecific-recognition(different individual)ability to recognize the hosts eggs parasitized at different time intervals were determined,and the superparasitism rate of single and multi-female T.remus under different host density were also investigated.The results showed no superparasitism in T.remus,either self-recognition or conspecific-recognition.After a single female T.remus parasitizing for 24 h at different parasitoid-egg ratios,the percentage of 1st instar larvae of T.remus in S.frugiperda eggs was less than 100%,and only one was found in each host egg.With multi-female T.remus and sufficient hosts,and when parasitoid-egg ratios were 1:100,2:200,4:400,6:600 and 8:800,the percentage of unparasitized host eggs were 52.8%,67.2%,63.2%,53.6%and 51.2%,respectively,and the percentage of host eggs with one 1st instar larva were 47.2%,32.8%,36.8%,46.4%and 48.8%,respectively.With multi-female T.remus and insufficient hosts,and when parasitoid-egg ratios were 2:20,3:21,4:20,7:21 and 20:20,the parasitism rates of T.remus were 60.0%,83.0%,95.0%,94.0%and 96.0%,respectively,and the superparasitism rates were 11.0%,38.0%,64.0%,73.0%and 92.0%,respectively,the average number of 1st instar larva of T.remus in a single host egg were 0.4,0.6,1.1,1.3 and 2.1,respectively,and the maximum number were 3.0,4.0,5.0,6.0 and 12.0,respectively.The results show that T.remus has the ability of self and conspecific-recognition,the superparasitism of a single female T.remus does not depend on host density.When the host is sufficient,the superparasitism of multi-female T.remus does not occur,but when the host is insufficient,the parasitism and superparasitism rate,the average and maximum number of 1st instar larvae in a single host egg increase with the increase of parasitoid-egg ratios.The parasito

关 键 词：夜蛾黑卵蜂 草地贪夜蛾 种内识别 过寄生 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]