草地贪夜蛾幼虫自残捕食量分析  

Analysis of cannibalism predation among larvae of Spodoptera frugiperda

作　　者：唐雪 吕宝乾[2] 卢辉[2] 唐继洪[2] 刘彦龙 闫三强 TANG Xue;LV Bao-Qian;LU Hui;TANG Ji-Hong;LIU Yan-Long;YAN San-Qiang(Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region,Institute of Entomology,Guizhou University,Guiyang 550025,China;Environment and Plant Protection Institute,Chinese Academy of Tropical Agriculture Sciences/Key Laboratory of Integrated Pest Management on Tropical Crops,Ministry of Agriculture and Rural Affairs/Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions/Hainan Key Laboratory of Tropical Agricultural Pest Monitoring and Control,Haikou 571101,China)

机构地区：[1]贵州大学昆虫研究所,贵州省山地农业病虫害重点实验室,贵阳550025 [2]中国热带农业科学院环境与植物保护研究所/农业农村部热带作物有害生物综合治理重点实验室/海南省南繁生物安全与分子育种重点实验室/海南省热带农业有害生物监测与控制重点实验室,海口571101

出　　处：《环境昆虫学报》2022年第3期523-529,共7页Journal of Environmental Entomology

基　　金：国家重点研发计划(2021YFD1400702);农业部财政项目“海南重大入侵生物—草地贪夜蛾与红火蚁监测与防控”(1630042020020);海南省重大科技计划资助(ZDKJ2020002)。

摘　　要：为了明确草地贪夜蛾Spodoptera frugiperda幼虫对同类低龄幼虫的捕食作用,在实验室条件下研究了草地贪夜蛾3~6龄幼虫对不同密度2龄幼虫和4~6龄幼虫对不同密度3龄幼虫的日捕食量,同时从捕食功能的角度解析了草地贪夜蛾高龄幼虫对低龄幼虫的捕食行为;并对不同龄期幼虫进行称重比较,用不同龄期幼虫间的重量关系来替换不同龄期幼虫间的捕食量,得到不同龄期幼虫间的捕食量方程。结果表明,草地贪夜蛾3~6龄幼虫对2龄幼虫和4~6龄幼虫对3龄幼虫的捕食功能反应均符合Holling Ⅱ型功能反应类型。草地贪夜蛾3~6龄幼虫对2龄幼虫的最大捕食量分别为76.47头、85.70头、117.92头、96.05头;4~6龄幼虫对3龄幼虫的最大捕食量分别为38.83头、59.49头、58.87头。高龄幼虫对低龄幼虫的捕食量随猎物密度的增加而增加。最大理论捕食质量方程y=47.231x^(0.4591),捕食者的捕食量随着猎物虫态的增大而逐渐减小。研究结果为理解草地贪夜蛾幼虫的种间自残行为规律奠定了一定的理论基础。In order to clarify the predation effect of Spodoptera frugiperda larvae on low instar larvae of the conspecific,the daily predation of the 3^(rd) to 6^(th) instar larvae on the 2^(nd) larvae of different densities and the 4^(th) to 6^(th) instar larvae on the 3^(rd) larvae of different densities were observed under laboratory conditions.At the same time,the predation behavior of the older larvae of S.frugiperda to the young larvae was analyzed from the point of view of functional response.Weighing the body weight of different instar larvae,the predation amount of different instar larvae was replaced by the weight relationship of different instar larvae,and the predatory function corresponding equations of different instar larvae was obtained.The results showed that the functional response of the 3^(rd) to 6^(th) instar larvae to the 2^(nd) larvae and the 4^(th) to 6^(th) instar larvae to the 3^(rd) larvae fitted well with the Holling Ⅱ mode.The maximum predation of the 3^(rd) to 6^(th) instar larvae on the 2^(nd) instar larvae were 76.47,85.70,117.92 and 96.05 respectively,and the maximum predation of the 4^(th) to 6^(th) instar larvae on the 3^(rd) instar larvae were 38.83,59.49 and 58.87 respectively.The predation of the older larvae to the younger larvae increased with the increase of the density of the younger larvae.The maximum theoretical predation mass equation is y=47.231x^(0.4591),and the amount of predation decreases with the increase of the state of prey.The results of this experiment laid a theoretical foundation for understanding the interspecific cannibalistic behavior of S.frugiperda larvae.

关 键 词：草地贪夜蛾 自相残杀 功能反应 幼虫密度 幼虫龄期 

分 类 号：Q965[生物学—昆虫学] S433[农业科学—农业昆虫与害虫防治]