益蝽5龄若虫对不同龄期粘虫幼虫的捕食作用  

The 5th Instar Nymph of Picromerus lewisi:Predation Responses to Different Instars of Mythimna seperata

作　　者：申修贤 田太安 刘健锋 于晓飞 董祥立 李治模 杨茂发[1,2] SHEN Xiuxian;TIAN Tai’an;LIU Jianfeng;YU Xiaofei;DONG Xiangli;LI Zhimo;YANG Maofa(Institute of Entomology of Guizhou University,Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Regions,Guiyang 550025;College of Tobacco Science of Guizhou University,Guiyang 550025;Fenggang Branch of Guizhou Tobacco Company,Zunyi,Guizhou 564200)

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]贵州大学烟草学院,贵阳550025 [3]贵州省烟草公司遵义市公司凤冈县分公司,贵州遵义564200

出　　处：《中国农学通报》2022年第3期116-120,共5页Chinese Agricultural Science Bulletin

基　　金：中国烟草总公司贵州省公司科技项目“贵州省山地生态烟叶无人机应用研究与示范”(201934);贵州省高层次创新型人才(“百”层次)培养项目(黔科合人才[2016]4022号)。

摘　　要：为了探究益蝽Picromerus lewisi对粘虫Mythimna seperata的生防潜能,室内条件下测定了益蝽5龄若虫对不同密度粘虫3~6龄幼虫的捕食量。结果表明:益蝽5龄若虫对粘虫3~6龄幼虫捕食作用均符合HollingⅡ方程,其中日最大捕食量为3龄(24.390)>4龄(7.042)>5龄(6.061)>6龄(3.690);瞬时攻击率为3龄(1.303)>4龄(0.404)>5龄(0.581)>6龄(0.554);随着粘虫不同龄期密度的增加,益蝽5龄若虫的搜寻效应逐渐降低,其中对3龄幼虫的搜寻效应最高,控害效能(a/Th)为31.780。随着益蝽5龄若虫密度增加,干扰作用增强,其种内干扰系数为0.720。因此,益蝽5龄若虫能捕食粘虫3~6龄幼虫,其中对粘虫3龄的捕食潜能最大。The aim is to study the biological control potential of Picromerus lewisi for Mythimna separata.The predation ability of the 5 th instar nymphs of Picromerus lewisi on the 3 rd to the 6 th instar larvae of Mythimna separata was detected under the indoor condition.The results showed that the predation of the 5 th instar nymphs of Picromerus lewisi on the 3 rd to the 6 th instar larvae of Mythimna separata accorded with HollingⅡequation.The average maximum daily prey was the 3 rd instar larva(24.390)>the 4 th instar larva(7.042)>the5 th instar larva(6.061)>the 6 th instar larva(3.690).The instantaneous attack rate was the 3 rd instar larva(1.303)>the 4 th instar larva(0.404)>the 5 th instar larva(0.581)>the 6 th instar larva(0.554).With the increase of the density of Mythimna separata at different instars,the searching efficiency of Picromerus lewisi5 th instar nymphs gradually decreased,and the searching efficiency for the 3 rd instar larvae was the highest,and a/Th was 31.780.With the increase of the density of the 5 th instar nymphs of Picromerus lewisi,the interference effect increased,and the intraspecific interference coefficient was 0.720.This study show that the5 th instar nymphs of Picromerus lewisi could prey on the 3 rd to the 6 th instar larvae of Mythimna separata,among which the predatory potential for the 3 rd instar Mythimna separata is the largest.

关 键 词：益蝽 粘虫 捕食 寻找效应 自身干扰 生物防治 

分 类 号：S435.13[农业科学—农业昆虫与害虫防治]