摘要
为科学评估我国优势天敌昆虫叉角厉蝽Eocanthecona furcellata对重要农业害虫草地贪夜蛾Spodoptera frugiperda的捕食作用,在笼罩条件下,采用功能反应方法评价了叉角厉蝽3龄和5龄若虫及雌成虫对草地贪夜蛾3龄和5龄幼虫的捕食能力。研究表明,除叉角厉蝽3龄若虫不能独立捕食草地贪夜蛾5龄幼虫外,叉角厉蝽其它虫态对草地贪夜蛾幼虫的捕食量均随猎物密度的升高而增加,捕食率则随猎物密度的升高而逐渐下降,经Logistic回归方程判别为II型功能反应。拟合的Rogers’随机捕食者方程参数表明,叉角厉蝽3龄和5龄若虫及雌成虫对草地贪夜蛾3龄幼虫的瞬时攻击率a分别为0.0295、0.0453和0.0965,处置单头猎物的时间Th分别为3.98 h、1.36 h和1.21 h,理论日最大捕食量T/Th分别为6.03头、17.65头和19.83头;叉角厉蝽5龄若虫和雌成虫对草地贪夜蛾5龄幼虫的瞬时攻击率a分别为0.0545和0.0876,处置单头猎物的时间Th分别为3.67 h和4.83 h,理论日最大捕食量T/Th分别为6.54头和4.97头。结果表明,在笼罩条件下叉角厉蝽3龄若虫的捕食能力最弱,除不能有效捕食草地贪夜蛾5龄幼虫外,对草地贪夜蛾3龄幼虫的捕食量也远低于5龄若虫和雌成虫,而叉角厉蝽5龄若虫和雌成虫的捕食能力较强,能有效捕食草地贪夜蛾的3龄和5龄幼虫,两者的捕食量相近。研究结果可为合理利用叉角厉蝽防治草地贪夜蛾提供实践参考。
To scientifically evaluate the predatory capability of the native natural enemy predatory stink bug Eocanthecona furcellata on the larvae of the important agricultural pest fall armyworm Spodoptera frugiperda.The predatory capabilities of the 3^(rd)and 5^(th)instar nymphs and female adults of E.furcellata on the 3^(rd)and 5^(th)instar larvae of S.frugiperda were evaluated by using functional response models in net cages.Results showed that the numbers of larvae of S.frugiperda consumed by E.furcellata increased and saturated as the prey density increased,except for the 3^(rd)instar nymph of E.furcellata,which could not prey on the 5^(th)instar larvae of S.frugiperda singly,while the predation rate of E.furcellata decreased with the increase of prey density.Both E.furcellata nymphs and female adults exhibited a type II functional response to different instar larvae of S.frugiperda based on Logistic regression equation.Parameters from Rogers’random predator equation showed that,the instantaneous attack rates a of the 3^(rd)and 5^(th)instar nymphs and female adults of E.furcellata on the 3^(rd)instar larvae of S.frugiperda were 0.0295,0.0453 and 0.0965,respectively,the handling time Th was 3.98 h,1.36 h and 1.21 h,respectively,and the theoretical daily maximum predation T/Th was 6.03,17.65 and 19.83,respectively.The instantaneous attack rates of the 5^(th)instar nymphs and female adults on the 5^(th)instar larvae of S.frugiperda were 0.0545 and 0.0876,the handling time was 3.67 h and 4.83 h,and the theoretical daily maximum predation was 6.54 and 4.97,respectively.Both the 5^(th)instar nymphs and female adults of E.furcellata exhibit strong predatory capability on the larvae of S.frugiperda,however,the predation ability of the 3^(rd)instar nymphs was relatively weak.These results provide a practical reference for the rational use of E.furcellata to control S.frugiperda.
作者
骆清兰
张春晖
李平东
彭李亚
覃晓
陈科伟
LUO Qing-Lan;ZHANG Chun-Hui;LI Ping-Dong;PENG Li-Ya;QIN-Xiao;CHEN Ke-Wei(Shenzhen Agricultural Technology Promotion Center,Shenzhen 518000,China;College of Plant Protection,South China Agricultural University,Guangzhou 510642,China;Shenzhen Ruidean Environmental Technology Co.,Ltd,Shenzhen 518107,China)
出处
《环境昆虫学报》
CSCD
北大核心
2024年第3期727-736,共10页
Journal of Environmental Entomology
基金
深圳市自然科学基金项目(JCYJ20210324140011030)
广东省重点领域研发计划项目(2020B020223004)
广东省甘蔗/剑麻产业技术体系创新团队项目(2023KJ104-08)。
关键词
叉角厉蝽
草地贪夜蛾
半田间环境
捕食功能反应
捕食能力
Eocanthecona furcellata
Spodoptera frugiperda
semi-field environmental conditions
functional response
predatory capability
