蠋蝽对灰茶尺蠖幼虫的捕食能力及种内干扰反应

doi:10.13305/j.cnki.jts.2024.04.007

摘要/Abstract

摘要： 为探明捕食性天敌昆虫蠋蝽（Arma chinensis）对茶园害虫灰茶尺蠖（Ectropis grisescens）幼虫的生物防控潜能,实验室内测定4~5龄蠋蝽若虫和雌成虫对3~5龄灰茶尺蠖幼虫的捕食能力和搜寻效应,并探讨了5龄蠋蝽若虫和雌成虫的种内干扰效应。结果表明,4~5龄蠋蝽若虫和雌成虫对3~5龄灰茶尺蠖幼虫均存在一定的捕食能力,且捕食功能反应方程与Holling Ⅱ模型相符。不同发育阶段的蠋蝽对3龄灰茶尺蠖幼虫的控害效能表现为雌成虫最高（33.042）,其次是5龄若虫（23.222）,4龄若虫最低（13.219）;蠋蝽雌成虫、5龄和4龄若虫对3龄灰茶尺蠖的最大捕食量分别为41.499头、37.178头和31.602头,蠋蝽雌成虫对3龄灰茶尺蠖的瞬时攻击率最大（0.793）,对猎物的处理时间最短（0.024βd）,表明蠋蝽雌成虫对3龄灰茶尺蠖幼虫捕食潜力最强。蠋蝽对3~5龄灰茶尺蠖幼虫的搜寻效应均随着猎物密度的降低而增加,蠋蝽的搜寻效应表现为雌成虫>5龄若虫>4龄若虫。蠋蝽5龄若虫和雌成虫对灰茶尺蠖幼虫的捕食行为受种内密度的干扰,5龄若虫的种内干扰作用小于雌成虫。

关键词: 蠋蝽, 灰茶尺蠖, 功能反应, 搜寻效应, 种内干扰

Abstract: To explore the biological control potential of Arma chinensis, a predatory insect, against Ectropis grisescens larvae, the predation and search effect of 4th-5th instar Arma chinensis nymphs and female adults on 3rd-5th instar larvae of Ectropis grisescens were measured in the laboratory, and the intraspecific interference effects of 5th instar Arma chinensis nymphs and female adults were also studied. The results show that both the nymphs and the female adults of the 4th-5th instar Arma chinensis had predatory ability to the larvae of the 3rd-5th instar of Ectropis grisescens, and the functional response equation of predation was in accordance with the Holling Ⅱ model. At different developmental stages of Arma chinensis, the female adults had the highest (33.042) control effectiveness to the larvae of Ectropis grisescens, the second is the 5th instar nymphs (23.222), and the lowest in the 4th instar nymphs (13.219). The female adults had a control effectiveness of 33.042 against the 3rd instar of Ectropis grisescens, the maximum predation of female adults, 5th and 4th instar nymphs of Arma chinensis on the 3rd instar larvae of Ectropis grisescens were 41.499, 37.178 and 31.602. The instantaneous attack rate (0.793) of the female adults of the Arma chinensis on the 3rd instar Ectropis grisescens was the highest, and the prey processing time for was shortest (0.024βd), indicating that the female adult of the Arma chinensis had the strongest potential to prey on the 3rd instar Ectropis grisescens larvae. The search effect of the Arma chinensis on the larvae of Ectropis grisescens increased with the decrease of the prey density. The search effect of Arma chinensis was as follows: female adults > 5th instar nymphs > 4th instar nymphs. The intraspecific density of the 5th instar nymphs and female adults of Arma chinensis interfered with the predation of the Ectropis grisescens, and the intraspecific interference of the 5th instar nymphs was less than that of the female adults.

Key words: Arma chinensis, Ectropis grisescens, functional response, search effect, intraspecific interference

中图分类号:

郭世保, 陈俊华, 张龙, 李非凡, 刘红敏, 史洪中. 蠋蝽对灰茶尺蠖幼虫的捕食能力及种内干扰反应[J]. 茶叶科学, 2024, 44(4): 609-617. doi: 10.13305/j.cnki.jts.2024.04.007.

GUO Shibao, CHEN Junhua, ZHANG Long, LI Feifan, LIU Hongmin, SHI Hongzhong. The Predatory Ability and Intraspecific Interference Response of Arma chinensis to the Larvae of Ectropis grisescens[J]. Journal of Tea Science, 2024, 44(4): 609-617. doi: 10.13305/j.cnki.jts.2024.04.007.

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