寄生3种夜蛾卵的夜蛾黑卵蜂种群增长潜能  

Population growth potential of Telenomus remus Nixon(Hymenoptera:Scelionidae)on eggs of three noctuid moths

作　　者：林丹敏 李子园 蒋炎炩 陆永跃[1] 陈科伟[1,2] LIN Dan-Min;LI Zi-Yuan;JIANG Yan-Ling;LU Yong-Yue;CHEN Ke-Wei(College of Plant Protection,South China Agricultural University,Guangzhou 510642,China;Key Laboratory of Bio-Pesticide Innovation and Application,Guangdong Province,Guangzhou 510642,China)

机构地区：[1]华南农业大学植物保护学院,广州501642 [2]广东省生物农药创制与利用重点实验室,广州501642

出　　处：《环境昆虫学报》2023年第5期1399-1408,共10页Journal of Environmental Entomology

基　　金：广东省重点领域研发计划(2020B020223004);广东省自然科学基金(2019A1515010588);广东省现代农业产业共性关键技术研发创新团队建设项目(2023KJ134);广东省甘蔗/剑麻产业技术体系创新团队项目(2023KJ104-08)。

摘　　要：夜蛾黑卵蜂是草地贪夜蛾卵期的一种重要寄生性天敌,适宜的寄主是实现其规模化繁育及应用的基础。本文应用实验种群生命表方法,分析、评价了草地贪夜蛾、斜纹夜蛾及甜菜夜蛾这3种夜蛾卵上夜蛾黑卵蜂的生长发育及种群增长潜能。结果表明,夜蛾黑卵蜂在3种夜蛾卵上均能顺利完成幼期发育且出蜂日期较为整齐,羽化当日即为产卵高峰日,羽化后3 d内的寄生卵量占总产卵量的80%以上。子代羽化率介于77.90%~85.56%之间,雌性比率介于0.53~0.59之间。不同寄主繁育的夜蛾黑卵蜂雄蜂后足胫节长度无明显差异,但以甜菜夜蛾卵繁育的雌蜂的后足胫节最长(152.00μm),斜纹夜蛾卵繁育的次之(146.33μm),草地贪夜蛾卵繁育的最短(142.67μm)。以甜菜夜蛾卵繁育的夜蛾黑卵蜂的内禀增长率(r_(m))、净生殖力(R_(0))及周限增长率(λ)均最高,分别为0.3486、57.94和1.4171,以斜纹夜蛾卵繁育的次之(r_(m),0.3091;R_(0),49.60;λ,1.3623),而以草地贪夜蛾卵繁育的最小(r_(m),0.2842;R_(0),31.29;λ,1.3286)。建议以甜菜夜蛾或斜纹夜蛾卵作为室内规模化繁育夜蛾黑卵蜂的寄主。The egg parasitoid Telenomus remus Nixon is an important biological control agent of Spodoptera frugiperda(J.E.Smith),and the suitable host is the basis for its mass rearing and further applications.In this study,the development and population growth potential of T.remus reared on the eggs of S.frugiperda,Spodoptera litura Fabricius and Spodoptera exigua(Hübner)were evaluated with life table in laboratory.Results showed that T.remus could successfully complete its immature development on all three types of nocturnal moth eggs,the date of emergence was relatively synchronous,and the day of eclosion was also the peak time for egg laying,and the number of eggs parasitized within 3 days after eclosion accounts for over 80% of the total eggs laid.The emergence rate of offsprings ranged from 77.90% to 85.56%,and the female ratio ranged from 0.53 to 0.59.There was no significant difference in the length of the hind tibia of male wasps bred from different hosts,but female wasps emerged from S.exigua eggs had the longest hind tibia(152.00μm),followed by those reared on S.litura(146.33μm)and S.frugiperda eggs(142.67μm).The highest intrinsic rate of increase(r_(m),0.3486),net reproductive rate(R_(0),57.97)and finite rate of increase(λ,1.4171)of T.remus were observed on the eggs of S.exigua,followed by those reared on S.litura(r_(m),0.3091,R_(0),49.60 and λ,1.3623,respectively)and those on S.frugiperda eggs(r_(m),0.2842,R_(0),31.29,andλ,1.3286,respectively).Eggs of S.exigua and S.litura were suggested as the suitable hosts for mass-rearing of T.remus in laboratory.

关 键 词：夜蛾黑卵蜂 夜蛾卵 寄主适合性 种群增长潜能 

分 类 号：Q968.1[生物学—昆虫学] S476[农业科学—农业昆虫与害虫防治]