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当前位置: 首页 > 文章 > 益蝽5龄若虫对不同龄期粘虫幼虫的捕食作用 中国农学通报 2022,38 (3) 116-120
Position: Home > Articles > The 5th Instar Nymph of Picromerus lewisi: Predation Responses to Different Instars of Mythimna seperata Chinese Agricultural Science Bulletin 2022,38 (3) 116-120

益蝽5龄若虫对不同龄期粘虫幼虫的捕食作用

作  者：
申修贤;田太安;刘健锋;于晓飞;董祥立;李治模;杨茂发
单  位：
贵州省烟草公司遵义市公司凤冈县分公司;贵州大学烟草学院;贵州大学昆虫研究所贵州省山地农业病虫害重点实验室
关键词：
益蝽;粘虫;捕食;寻找效应;自身干扰;生物防治
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。
译  名：
The 5th Instar Nymph of Picromerus lewisi: Predation Responses to Different Instars of Mythimna seperata
作  者：
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;College of Tobacco Science of Guizhou University;Fenggang Branch of Guizhou Tobacco Company;
关键词：
Picromerus lewisi;;Mythimna seperata;;predation;;searching efficiency;;intraspecific interference;;biological control
摘  要：
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 Holling Ⅱequation. 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.

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