黄带犀猎蝽对甜菜夜蛾3龄幼虫的捕食作用  

Predation Effect of Sycanus croceovittatus on the 3rd-Instar Larvae of Spodoptera exigua

作　　者：陈苏怡 赵萍 石安宪 史爱民 王春娅 彩万志 李虎 CHEN Suyi;ZHAO Ping;SHI Anxian;SHI Aimin;WANG Chunya;CAI Wanzhi;LI Hu(College of Plant Protection,China Agricultural University,Beijing 100193,China;Institute of Geography and Oceanography,Nanning Normal University,Nanning 530001,China;Station of Plant Protection of Zhaotong City,Zhaotong 657100,China;Suzhou Tuidongzhe Biotechnology Co.,LTD,Suzhou 215000,China)

机构地区：[1]中国农业大学植物保护学院,北京100193 [2]南宁师范大学地理与海洋研究院,南宁530001 [3]昭通市植保植检站,昭通657100 [4]苏州推动者生物科技有限公司,苏州215000

出　　处：《中国生物防治学报》2023年第2期289-296,共8页Chinese Journal of Biological Control

基　　金：昭通市专家工作站(2019ZTYX03,2021ZTYX05);云南省生物多样性保护基金会

摘　　要：黄带犀猎蝽(半翅目:异翅亚目:猎蝽科)是一种广泛分布我国南方省区的捕食性天敌,是许多鳞翅目、鞘翅目、半翅目害虫的潜在生防因子。为明确黄带犀猎蝽对甜菜夜蛾(鳞翅目:夜蛾科)的控害潜能,本研究在实验室条件下研究了黄带犀猎蝽3~5龄若虫和雌、雄成虫对不同密度甜菜夜蛾3龄幼虫的捕食功能反应、搜寻效应和自身密度干扰反应。结果表明:黄带犀猎蝽捕食量随猎物密度增加而上升,且5龄若虫对甜菜夜蛾3龄幼虫捕食效果最佳;各虫态黄带犀猎蝽的捕食功能反应均符合HollingⅡ型和HollingⅢ型功能反应模型;拟合HollingⅡ模型中黄带犀猎蝽3~5龄若虫和雌、雄成虫对甜菜夜蛾3龄幼虫的日均最大捕食量分别为9.12、11.42、22.86、23.74和23.09头,控害效能分别为12.63、15.56、29.04、24.04和16.83;拟合HollingⅢ模型中黄带犀猎蝽3~5龄若虫和雌、雄成虫日均最大捕食量分别为8.35、10.06、17.54、16.52和14.15头,最佳寻找密度分别为3.92、4.46、7.20、7.87和8.69头/盒;搜寻效应与害虫密度呈负相关,自身密度干扰反应与天敌密度呈正相关。总之,黄带犀猎蝽5龄若虫较其余虫态对甜菜夜蛾3龄幼虫具有更高的捕食能力。Sycanus croceovittatus(Hemiptera:Heteraptera:Reduviidae),a widely distributed predatory natural enemy in the southern provinces of China,is a potential biological control agent for lepidopteran,coleopteran and hemipteran pests.In order to evaluate the potential of Sy.croceovittatus to control Spodoptera exigua(Lepidoptera:Noctuidae),the 3rd–5th-instar nymphs and adults of Sy.croceovittatus were tested in laboratory condition for their predation functional responses and searching effects on the 3rd-instar larvae of Sp.exigua at different densities,as well as for the effect of conspecific density interference.The results showed that the predation amount of Sy.croceovittatus increased significantly with the increase of prey density,and the 5th-instar nymphs had the highest predation on the 3rd-instar larvae of Sp.exigua.The predation functional responses of Sy.croceovittatus at different stages fitted well with both HollingⅡand HollingⅢmodels.In the Holling II model,the 3rd-5th-instar nymphs and female and male adults of Sy.Croceovittatus had the daily maximum consumption of 9.12,11.42,22.86,23.74 and 23.09,and the predation capacity of 12.63,15.56,29.04,24.04 and 16.83,respectively.According to the HollingⅢmodel,the 3rd-5th-instar nymphs and female and male adults of Sy.croceovittatus had the daily maximum consumption of 8.35,10.06,17.54,16.52 and 14.15,and the optimal searching density of 3.92,4.46,7.20,7.87 and 8.69 per box,respectively.The searching effect was negatively correlated with the pest density,and the conspecific density interference effect was positively correlated with the density of natural enemy.In conclusion,the 5th-instar nymphs had the higher predation ability on the 3rd-instar larvae of Sp.exigua than other developmental stages of Sy.croceovittatus..

关 键 词：黄带犀猎蝽 甜菜夜蛾 捕食功能反应 搜寻效应 自身密度干扰反应 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]