红彩瑞猎蝽对斜纹夜蛾幼虫的捕食能力评价  

Evaluation of predation ability of Rhynocoris fuscipes on Spodoptera litura larvae

作　　者：孙郑 游梓翊 陈德鑫 夏长剑 邓海滨 SUN Zheng;YOU Ziyi;CHEN Dexin;XIA Changjian;DENG Haibin(Tobacco Research Institute of Guangdong Province,Shaoguan 512029,Guangdong,China;Haikou Cigar Research Institute,Hainan Provincial Tobacco Company of CNTC,Haikou 571100,China)

机构地区：[1]广东省烟草科学研究所,广东省韶关市512029 [2]中国烟草总公司海南省公司海口雪茄研究所,海南省海口市571100

出　　处：《烟草科技》2024年第6期55-63,共9页Tobacco Science & Technology

基　　金：中国烟草总公司科技重大专项项目“利用红彩瑞猎蝽防治斜纹夜蛾/烟青虫技术研究与集成应用”[110202101028(LS-03)];“基于烟草和非烟作物天敌协同的控害机制研究”[110202101046(LS-06)];中国烟草总公司广东省公司科技项目“烟草害虫优势天敌红彩瑞猎蝽的开发与应用技术研究”(201944000020031);海南省重点研发计划项目“以天敌为主的海南雪茄烟鳞翅目害虫绿色防控关键技术研究与推广应用”(ZDYF2021XDNY141)。

摘　　要：为了解红彩瑞猎蝽(Rhynocoris fuscipes)对斜纹夜蛾(Spodoptera litura)幼虫的捕食能力,在室内条件下分析了不同虫态红彩瑞猎蝽对斜纹夜蛾3龄幼虫、红彩瑞猎蝽雌成虫对斜纹夜蛾2~5龄幼虫的捕食功能反应、搜寻效应以及红彩瑞猎蝽密度对捕食斜纹夜蛾的干扰作用,并分析了按照不同益害比释放红彩瑞猎蝽对斜纹夜蛾的田间防治效果。结果表明,红彩瑞猎蝽3~5龄若虫和雄成虫对斜纹夜蛾3龄幼虫、红彩瑞猎蝽雌成虫对斜纹夜蛾2~3龄幼虫的捕食功能反应均符合HollingⅡ型功能反应模型,红彩瑞猎蝽雌成虫对斜纹夜蛾4~5龄幼虫的捕食功能反应符合HollingⅢ型功能反应新模型。不同虫态红彩瑞猎蝽对斜纹夜蛾3龄幼虫的日最大捕食量由大到小依次为15.38头(雌成虫)、14.49头(雄成虫)、11.24头(5龄若虫)、8.77头(4龄若虫)和7.52头(3龄若虫),红彩瑞猎蝽雌成虫对斜纹夜蛾2~5龄幼虫的日最大捕食量分别为27.78、15.63、9.19和6.00头,对斜纹夜蛾4~5龄幼虫的最佳寻找密度分别为7.04和5.05头/皿。红彩瑞猎蝽雌成虫对斜纹夜蛾3龄幼虫的搜寻效应大于其他虫态,且搜寻效应随斜纹夜蛾3龄幼虫密度增加而降低。随红彩瑞猎蝽密度的增加,红彩瑞猎蝽种内干扰作用增大,对斜纹夜蛾幼虫的日捕食量减小。田间按照益害比1∶5、1∶10、1∶15和1∶20释放红彩瑞猎蝽,10 d后对斜纹夜蛾的防治效果分别达88.07%、87.16%、82.13%和75.72%。To investigate the predatory behavior of Rhynocoris fuscipes against larvae of Spodoptera litura,the predatory functional response,foraging efficiency and intraspecific interference response of R.fuscipes at different stages on the 3rd instar larvae of S.litura,along with the female adults of R.fuscipes on the 2nd to 5th instar larvae of S.litura were analyzed under indoor conditions,and the field control efficiencies of R.fuscipes released at different predator-prey ratios on S.litura were analyzed.The results showed that the predatory functional responses exhibited by male adults and the 3rd to 5th instar nymphs of R.fuscipes on the 3rd instar larvae of S.litura and female adults of R.fuscipes on the 2nd and 3rd instar larvae of S.litura were consistent with the HollingⅡmodel,and female adults of R.fuscipes on the 4th and 5th instar larvae of S.litura were consistent with the new HollingⅢfunctional response model.The maximum daily predation rates of R.fuscipe at different stages on the 3rd instar larvae of S.litura in decreasing order were 15.38(female adult),14.49(male adult),11.24(5th instar nymph),8.77(4th instar nymph)and 7.52(3rd instar nymph).The maximum daily predation rates of R.fuscipes adult females on the 2nd to 5th instar larvae of S.litura were 27.78,15.63,9.19,and 6.00,respectively.The optimal foraging densities for the 4th and 5th instar larvae of S.litura were 7.04 and 5.05 per dish,respectively.The foraging efficiency of adult female R.fuscipes was higher than that of the other life stages,and the foraging efficiency gradually decreased with increasing population density of the 3rd instar larvae of S.litura.With increasing density,the interference and competition between different life stages of R.fuscipes were enhanced,leading to a gradual decrease in the rate of predation on S.litura larvae.The control effects on S.litura were 88.07%,87.16%,82.13%and 75.72%after 10 days of R.fuscipes release at predator-prey ratios of 1∶5,1∶10,1∶15 and 1∶20 in the fields.

关 键 词：红彩瑞猎蝽 斜纹夜蛾 捕食功能 生物防治 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]