蠋蝽若虫对瓜绢螟幼虫的捕食作用  

Predation of Diaphania indica Larvae by Arma chinensis

作　　者：王桦 王遥宁 王凯 方玲 苏宏华 WANG Hua;WANG Yaoning;WANG Kai;FANG Ling;SU Honghua(College of Plant Protection,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学植物保护学院,扬州225009

出　　处：《中国生物防治学报》2024年第4期813-819,共7页Chinese Journal of Biological Control

基　　金：江苏省农业科技自主创新资金单项技术研发(CX(22)3011)。

摘　　要：瓜绢螟是葫芦科作物上重要的害虫,蠋蝽是对农林害虫具有强捕食能力的天敌。为探明蠋蝽若虫对瓜绢螟幼虫的捕食能力,本文在室内27℃条件下,开展蠋蝽3龄和5龄若虫对不同密度的瓜绢螟3龄和5龄幼虫的捕食作用研究,并用捕食功能反应模型进行拟合。结果表明蠋蝽若虫对瓜绢螟幼虫的捕食均符合HollongⅡ功能反应模型。蠋蝽捕食量随瓜绢螟密度的升高而增加,但随着害虫密度进一步增加捕食量增长的趋势变缓。搜寻效应随瓜绢螟密度的增加而逐渐降低。5龄蠋蝽若虫对3龄和5龄瓜绢螟的瞬时攻击率、处理时间、捕食量和控害效能均优于3龄蠋蝽,且其拟合的Holling II圆盘方程效果更好。因此建议选择蠋蝽5龄若虫进行田间释放用于防控瓜绢螟。本研究明确了蠋蝽捕食瓜绢螟的潜力,为进一步田间释放蠋蝽防控瓜绢螟提供科学参考。Diaphania indica Saunders is one of the most important pests in cucurbitaceae vegetables.Arma chinensis Fallou is a powerful predator which can feed on agricultural and forestry pests.The predation capability of A.chinensis to D.indica was studied by measuring the predation potential of the 3^(rd) and 5^(th) A.chinensis nymphs to the 3^(rd) and 5^(th) D.indica under different densities at 27℃in the laboratory and fitting the data with the functional response model.The results showed that the predation functional response of different A.chinensis nymphs to different D.indica larvae all fitted well with HollingⅡmodel.The predation amount increased with the increase of the pest density,but showed a slowed increase at higher prey density.The searching efficiency decreased with the increase of the pest density.Compared with the 3^(rd) A.chinensis nymphs,the 5^(th) nymphs had a higher instantaneous attack rate,shorter treatment time,more predation number and higher predation efficacy.Further,the predation functional response was better fitted to Holling II disc equation.Hence,it is suggested that the 5^(th) A.chinensis nymphs be released in the fields to control D.indica larvae.In this study,the predation potential of A.chinensis nymphs is clarified,which provides a scientific support for the release of the predator to control D.indica larvae in fields.

关 键 词：瓜绢螟 蠋蝽 捕食作用 功能反应 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]