摘要
短管赤眼蜂Trichogramma pretiosum与夜蛾黑卵蜂Telenomus remus均为草地贪夜蛾Spodoptera frugiperda卵期的重要寄生性天敌。为检验两种卵寄生蜂混合释放条件下的竞争能力,本试验于田间同时释放短管赤眼蜂和夜蛾黑卵蜂,统计分析了两种卵寄生蜂对草地贪夜蛾的寄生效能及种间竞争情况。结果显示,短管赤眼蜂对释放的草地贪夜蛾卵块的卵块寄生率为52.94%,卵粒寄生率为3.28%;对田间自然卵块的卵块寄生率为53.33%,卵粒寄生率为5.80%。夜蛾黑卵蜂对释放的草地贪夜蛾卵块的卵块寄生率为88.23%,卵粒寄生率为9.96%;对田间自然卵块的卵块寄生率为100.00%,卵粒寄生率为50.33%。在未进行放蜂处理的对照田中,未出现短管赤眼蜂,夜蛾黑卵蜂的卵块寄生率为23.57%,卵粒寄生率为7.67%。本研究结果表明,在高温高湿环境中,夜蛾黑卵蜂在田间竞争中处于优势。本研究结果将为利用卵寄生蜂防控草地贪夜蛾提供参考。
Trichogramma pretiosum and Telenomus remus are important natural enemies of Spodoptera frugiperda.In order to test the competitiveness of two species of parasitoids under mixed release conditions,T.pretiosum and T.remus were released simultaneously in the field,and the parasitic efficiency and interspecies competition of T.pretiosum and T.remus were statistically analyzed.The results showed that for T.pretiosum,the parasitic rate to released egg masses was 52.94%and the parasitic rate to eggs was 3.28%;the parasitic rate to natural egg masses in field was 53.33%and the parasitic rate to eggs was 5.80%.For T.remus,the parasitic rate to released egg masses was 88.23%and the parasitic rate to eggs was 9.96%;the parasitic rate to natural egg masses in field was 100.00%and the parasitic rate to eggs was 50.33%.In control field without released parasitoids,T.pretiosum never showed up,and the parasitic rate to released egg masses of T.remus was 23.57%and the parasitic rate to eggs was 7.67%.According to this study,in the environment of high temperature and high humidity,T.remus had an advantage in field competition with T.pretiosum.The results will provide a reference for application of these two parasitoids in the control of S.frugiperda.
作者
朱凯辉
周金成
张柱亭
何康来
张礼生
董辉
ZHU Kaihui;ZHOU Jincheng;ZHANG Zhuting;HE Kanglai;ZHANG Lisheng;DONG Hui(College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China;Kaili University, Kaili556011, China;Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)
出处
《植物保护》
CAS
CSCD
北大核心
2020年第2期267-271,共5页
Plant Protection
基金
国家重点研发计划(2017YFD0201000)。
关键词
短管赤眼蜂
夜蛾黑卵蜂
草地贪夜蛾
田间防效
生物防治
Trichogramma pretiosum
Telenomus remus
Spodoptera frugiperda
field control effect
biological control
