欢迎访问《中国农学通报》,

中国农学通报 ›› 2022, Vol. 38 ›› Issue (3): 116-120.doi: 10.11924/j.issn.1000-6850.casb2021-0251

所属专题: 生物技术

• 植物保护·农药 • 上一篇    下一篇

益蝽5龄若虫对不同龄期粘虫幼虫的捕食作用

申修贤1(), 田太安1, 刘健锋1, 于晓飞2, 董祥立3, 李治模3, 杨茂发1,2()   

  1. 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
  • 收稿日期:2021-03-20 修回日期:2021-06-13 出版日期:2022-01-25 发布日期:2022-02-25
  • 通讯作者: 杨茂发
  • 作者简介:申修贤,男,1991年出生,贵州人,博士研究生,主要从事害虫生物防治研究。通信地址:550025 贵州省贵阳市花溪区贵州大学农学院,Tel:15761633109,E-mail: xiuxianshen_2017@126.com
  • 基金资助:
    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)

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

SHEN Xiuxian1(), TIAN Tai’an1, LIU Jianfeng1, YU Xiaofei2, DONG Xiangli3, LI Zhimo3, YANG Maofa1,2()   

  1. 1Institute of Entomology of Guizhou University, Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Regions, Guiyang 550025
    2College of Tobacco Science of Guizhou University, Guiyang 550025
    3Fenggang Branch of Guizhou Tobacco Company, Zunyi, Guizhou 564200
  • Received:2021-03-20 Revised:2021-06-13 Online:2022-01-25 Published:2022-02-25
  • Contact: YANG Maofa

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。

关键词: 益蝽, 粘虫, 捕食, 寻找效应, 自身干扰, 生物防治

Abstract:

The aim is to study the biological control potential of Picromerus lewisi for Mythimna separata. The predation ability of the 5th instar nymphs of Picromerus lewisi on the 3rd to the 6th instar larvae of Mythimna separata was detected under the indoor condition. The results showed that the predation of the 5th instar nymphs of Picromerus lewisi on the 3rd to the 6th instar larvae of Mythimna separata accorded with Holling Ⅱ equation. The average maximum daily prey was the 3rd instar larva (24.390) > the 4th instar larva (7.042) > the 5th instar larva (6.061) > the 6th instar larva (3.690). The instantaneous attack rate was the 3rd instar larva (1.303)> the 4th instar larva (0.404)> the 5th instar larva (0.581)> the 6th instar larva (0.554). With the increase of the density of Mythimna separata at different instars, the searching efficiency of Picromerus lewisi 5th instar nymphs gradually decreased, and the searching efficiency for the 3rd instar larvae was the highest, and a/Th was 31.780. With the increase of the density of the 5th instar nymphs of Picromerus lewisi, the interference effect increased, and the intraspecific interference coefficient was 0.720. This study show that the 5th instar nymphs of Picromerus lewisi could prey on the 3rd to the 6th instar larvae of Mythimna separata, among which the predatory potential for the 3rd instar Mythimna separata is the largest.

Key words: Picromerus lewisi, Mythimna seperata, predation, searching efficiency, intraspecific interference, biological control

中图分类号: