异色瓢虫幼虫对草地贪夜蛾卵和低龄幼虫的捕食作用  

Predation functional response of Harmonia axyridis larvae to the eggs and low instar larvae of Spodoptera frugiperda

作　　者：赵英杰 符成悦 李维薇 张立敏[1,2] 杜广祖[1] 陈斌[1] 李正跃[1] ZHAO Yingjie;FU Chengyue;LI Weiwei;ZHANG Limin;DU Guangzu;CHEN Bin;LI Zhengyue(College of Plant Protection,Yunnan Agricultural University,Kunming 650201,China;International Cooperation and Exchange Department,Yunnan Agricultural University,Kunming 650201,China)

机构地区：[1]云南农业大学植物保护学院,云南生物资源保护与利用国家重点实验室,昆明650201 [2]云南农业大学国际合作交流处,昆明650201

出　　处：《植物保护》2020年第1期51-54,86,共5页Plant Protection

基　　金：国家重点研发计划(2018YFD0200703);国家自然科学基金(31660537,31760519)

摘　　要：为明确天敌昆虫异色瓢虫Harmonia axyridis对草地贪夜蛾Spodoptera frugiperda的捕食能力,在室内光照培养箱中,于(25±1)℃、L∥D=16 h∥8 h条件下,研究了异色瓢虫幼虫对草地贪夜蛾卵和低龄幼虫的捕食功能反应与寻找效应。结果表明:异色瓢虫幼虫对草地贪夜蛾卵和低龄幼虫的捕食功能反应符合HollingⅡ模型。异色瓢虫1龄幼虫对草地贪夜蛾卵的日最大捕食量、瞬时攻击率和处理时间分别为25.6粒、1.035和0.039 d;异色瓢虫4龄幼虫对草地贪夜蛾2龄幼虫的日最大捕食量、瞬时攻击率和处理时间分别为33.3头、0.736和0.03 d。异色瓢虫幼虫对草地贪夜蛾卵和低龄幼虫的寻找效应随猎物密度的增加而下降。异色瓢虫幼虫对草地贪夜蛾卵和低龄幼虫具有较好的控制效果,可用于对草地贪夜蛾的防控实践。To clarify the predation and control ability of Harmonia axyridis on Spodoptera frugiperda. The predation function and searching efficiency of H. axyridis larvae on eggs and low instar larvae of S. frugiperda were studied in an indoor light incubator at(25±1)℃ and L//D=16 h//8 h. The functional responses of H. axyridis larvae to eggs and low instar larvae of S. frugiperda fitted well with HollingⅡ model. Daily maximum predation, instantaneous attack rate and handling time of the 1 st instar larvae of H. axyridis to eggs of S. frugiperda were 25.6 individuals, 1.035 and 0.039 d, respectively. Daily maximum predation, instantaneous attack rate and handling time of the 4 th instar larvae of H. axyridis to 2 nd instar larvae of S. frugiperda were 33.3 individuals, 0.736 and 0.03 d, respectively. The search effect of the larvae of H. axyridis on the eggs and low instars of S. frugiperda decreased with the increase of the prey density. H. axyridis larvae showed a good control efficacy on S. frugiperda eggs and low instar larvae, and can be used in the control of S. frugiperda.

关 键 词：异色瓢虫 草地贪夜蛾 功能反应 寻找效应 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治] S433.4[农业科学—植物保护]