黄带犀猎蝽对小菜蛾的捕食作用  

Study of the predation of Plutella xylostella by Sycanus bifidus

作　　者：姚冰珂 杜嘉宜 高莉萍 曹飞 黎叶[1,2] 王圣红 王香萍 YAO Bingke;DU Jiayi;GAO Liping;CAO Fei;LI Ye;WANG Shenghong;WANG Xiangping(Agricultural and Forestry Pests Early Warning and Control Engineering Technology Center of Hubei Province,Jingzhou,Hubei 434025,China;Yangtze University,Jingzhou,Hubei 434025,China)

机构地区：[1]农林病虫害预警与调控湖北省工程技术中心,湖北荆州434025 [2]长江大学,湖北荆州434025

出　　处：《生物安全学报(中英文)》2025年第1期81-85,102,共6页Journal of biosafety

基　　金：广西作物病虫害生物学重点实验室开放课题(2020Z20027);长江大学创新创业项目(YZ202201)。

摘　　要：【目的】探究不同虫态黄带犀猎蝽对小菜蛾幼虫的捕食能力,为小菜蛾的生物防治提供理论根据。【方法】在实验室条件下开展黄带犀猎蝽3、4、5龄若虫及成虫对小菜蛾3、4龄幼虫的捕食功能反应、搜寻效应及干扰反应。【结果】黄带犀猎蝽3、4、5龄若虫及成虫对小菜蛾3、4龄幼虫的捕食功能反应均符合HollingⅡ型圆盘方程,即其捕食量随着猎物密度增加而逐渐增加。与捕食小菜蛾3龄幼虫相比,黄带犀猎蝽雌成虫和5龄若虫对小菜蛾4龄幼虫的日最大捕食量较大,分别为93.63和58.34头;与若虫相比,黄带犀猎蝽雌成虫对小菜蛾3、4龄幼虫的捕食效能(a/T)更好,分别为60.98和103.65。黄带犀猎蝽对小菜蛾的捕食量与猎物密度呈正相关,而搜寻效应与猎物密度呈负相关,且黄带犀猎蝽雌成虫的搜寻效应最高。随着黄带犀猎蝽密度的增大,种内干扰作用增强,黄带犀猎蝽的捕食率呈下降趋势。【结论】黄带犀猎蝽在防治小菜蛾方面有较好的潜力,可应用于小菜蛾的防控实践。【Aim】The predation of Plutella xylostella by Sycanus bifidus in different insect states was investigated to provide a theoretical basis for the biological control of P.xylostella.【Method】The predation functional response,search effect,and interference response of old nymphs and adults of S.bifidus to the 3rd and 4th instar larvae of P.xylostella were studied under laboratory conditions.【Result】The functional responses of the 3rd,4th,and 5th instar nymphs and adults of S.bifidus towards the 3rd and 4th instar larvae of P.xylostella conformed to the Holling II type disk equation,indicating that,the degree of predation increased with the increase in prey density.The female adults and 5th instar nymphs of S.bifidus showed higher daily maximum predation rates towards the 4th instar larvae of P.xylostella,i.e.,93.63 and 58.34,respectively,compared with those towards the 3rd instar larvae of P.xylostella.Compared with nymphs,the predation efficiencies(a/T)of the female adults of S.bifidus towards the 3rd and 4th instar larvae of P.xylostella were better,i.e.,60.98 and 103.65,respectively.The degree of predation of S.bifidus was positively correlated with prey density,whereas the search effect was negatively correlated with prey density,with the highest search effect being observed in female adults.With an increase in the densities of S.bifidus and its prey,the intraspecific interference increased,and the predation rate decreased.【Conclusion】The results showed that S.bifidus had good potential for the prevention and control of P.xylostella and could be used for pest management practices targeting P.xylostella.

关 键 词：黄带犀猎蝽 小菜蛾 捕食功能 搜寻反应 干扰反应 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]