唐艺婷　郭义　潘明真　毛建军　陈红印　张礼生　王孟卿

摘要 本试验在室内研究了蠋蝽3～5龄若虫及成虫对小菜蛾幼虫的捕食能力，采用HollingⅡ功能反应模型和Hassell模型，以明确蠋蝽对小菜蛾的捕食潜能以及蠋蝽自身密度对小菜蛾捕食作用的影响。结果表明，蠋蝽3～5龄若虫及成虫对小菜蛾幼虫的捕食模型均符合HollingⅡ模型;蠋蝽3～5龄若虫和成虫瞬时攻击率由大到小依次为1.461（3龄若虫）>1.322（4龄若虫）>1.086（5龄若虫）>0.803（雌成虫）>0.734（雄成虫）;蠋蝽5龄若虫的日最大捕食量最高，为83.33头。随着小菜蛾幼虫密度增大，蠋蝽的搜寻效应逐渐降低，5龄若虫的搜寻效应明显大于其他虫态。蠋蝽3～5龄若虫及成虫自身密度对其捕食作用的干扰效应明显，其中蠋蝽3龄若虫的竞争参数最大，为0.862。本研究表明蠋蝽对小菜蛾具有较好的捕食潜力，尤其是蠋蝽5龄若虫。

关键词 蠋蝽; 小菜蛾; 功能反应; 生物防治

中图分类号： S 476.2

文献标识码： A

DOI： 10.16688/j.zwbh.2019243

Predation of Plutella xylostella larva by Arma chinensis

TANG Yiting1， GUO Yi2， PAN Mingzhen3， MAO Jianjun1， CHEN Hongyin1，

ZHANG Lisheng1， WANG Mengqing1*

（1. Institute of Plant Protection， Chinese Academy of Agricultural Sciences， USDA-ARS Sino-American

Biological Control Laboratory， Beijing 100193， China; 2. Institute of Plant Protection， Guangdong Academy

of Agricultural Sciences， Guangzhou 510640， China; 3. College of Plant Health and Medicine，

Qingdao Agricultural University， Qingdao 266109， China）

Abstract

The predation of Plutella xylostella by the 3rd-5th instar nymphs and adults of Arma chinensis was studied in the laboratory. Holling Ⅱ function response model and Hassell interference response models were used to determine the predation potential of A.chinensis and the effect of prey density. The results showed that 3rd-5th instar nymphs and adults of predator exhibited Holling Ⅱ functional responses. The sequence of attacking efficiency was as followed： 3rd instar nymph （1.461）， 4th instar nymph （1.322）， 5th instar nymph （1.086）， female adult （0.803） and male adult （0.734）. The maximum daily predation capacity of 5th instar nymph was 83.33 individuals. With the increase of preys density， predators searching efficiency decreased gradually， and the searching efficiency of 5th instar nymph was obviously higher than that of other stages. The interference effect of the population density to the predator was significant， and the competition parameter of 3rd instar nymph was the biggest （0.862）. It indicated a substantial predation potential， especially the 5th instar nymph of A.chinensis against P.xylostella.

Key words

Arma chinensis; Plutella xylostella; functional response; biological control

小菜蛾Plutella xylostella （Linnaeus）属于鳞翅目，菜蛾科，是一种世界性农业害虫，幼虫主要为害十字花科蔬菜，咬食蔬菜叶片成网状或孔洞状，造成蔬菜减产甚至绝收[1]。长期以来化学农药的大量使用，使小菜蛾的抗药性增强。针对其抗药性，近些年小菜蛾的抗药机理研究较多[2-7]，但是研究小菜蛾抗药机理不仅花费的时间长，且不能直接应用于田间。而利用生物防治的方法防治小菜蛾，符合当下“绿色发展”的要求，符合现代人们对绿色食品，健康生活的需求。目前用于防治小菜蛾的天敌多为寄生性昆虫[8-9]，小菜蛾捕食性天……