摘要
【目的】捕食螨运动速率直接影响其捕食能力。本研究分析了5种寄主植物对捕食螨——双尾新小绥螨Neoseiulus bicaudus运动速率的影响,旨在探究双尾新小绥螨在不同寄主植物上对土耳其斯坦叶螨的捕食能力。【方法】采用数字图像处理技术,分析双尾新小绥螨雌成螨在菜豆Phaseolus vulgaris、棉花Gossypium hirsutum、番茄Solanum lycopersicum、茄子Solanum melongena和黄瓜Cucumis sativus上的运动速度,进一步采用小室观察法比较了寄主植物对双尾新小绥螨捕食功能反应的影响。【结果】双尾新小绥螨在5种寄主植物上的运动速度依次为:菜豆(0. 62 cm/s)和棉花(0. 60 cm/s)>黄瓜(0. 38 cm/s)和茄子(0. 36 cm/s)>番茄(0. 27 cm/s)。进一步捕食功能反应结果表明,在5种寄主植物上,双尾新小绥螨对土耳其斯坦叶螨的捕食量均随猎物密度的增加而升高,增加到一定程度后趋于缓和,其捕食类型均属于HollingⅡ型。双尾新小绥螨在菜豆上对土耳其斯坦叶螨的攻击系数(a)最高,为1. 124;在棉花上的处理时间(Th)最短,为0. 059。同时,在菜豆和棉花上的捕食能力较强,a/Th值分别为18. 177和16. 763;而在番茄、茄子和黄瓜上的捕食能力较弱,a/Th值分别为6. 780,6. 537和6. 369。【结论】双尾新小绥螨在棉花和菜豆上的运动速度最快,同时捕食能力也最强。
【Aim】The predation ability of Neoseiulus bicaudus depends on its movement rate.This study analyzed the effect of five host plants on the movement rate of N.bicaudus in order to explore the predation ability of N.bicaudus to Tetranychus turkestani on different host plants.【Methods】The movement rates of female adults of N.bicaudus on five host plants including green bean(Phaseolus vulgaris),cotton(Gossypium hirsutum),tomato(Solanum lycopersicum),eggplant(Solanum melongena)and cucumber(Cucumis sativus)were recorded by digital image processing technology,and the effects of host plants on the predating functional response of N.bicaudus were compared by direct observation.【Results】The movement rates of N.bicaudus on the fivehost plants ranked in the descending order as green bean(0.62 cm/s)and cotton(0.60 cm/s)>cucumber(0.38 cm/s)and eggplant(0.36 cm/s)>tomato(0.27 cm/s).Further study on predating functional responses of N.bicaudus on the five host plants indicated that the prey consumption increased as the prey density increased until it reached a plateau where the consumption rate remained constant,exhibiting a Holling type II response.The attack rate(a)of N.bicaudus against T.turkestani on green bean(1.124)was the highest.The handling time(T h)on cotton(0.059)was the shortest.The predation abilities of N.bicaudus on green bean and cotton were strong,with the a/T h values of 18.177 and 16.763,respectively,while those on tomato,eggplant and cucumber were weak,with the a/T h values of 6.780,6.537 and 6.369,respectively.【Conclusion】On green bean and cotton,the movement rates of N.bicaudus are the fastest and its predation ability is the strongest.
作者
张燕南
顾佳敏
陈静
王佩玲
张建萍
ZHANG Yan-Nan;GU Jia-Min;CHEN Jing;WANG Pei-Ling;ZHANG Jian-Ping(Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resource Utilization,Universities of Xinjiang Uygur Autonomous Region,Key Laboratory of Oasis Eco-agriculture,Xinjiang Production and Construction Group,College of Agriculture,Shihezi University,Shihezi,Xinjiang 832000,China;College of Life Science and Technology,Mianyang Normal University,Mianyang,Sichuan 621000,China)
出处
《昆虫学报》
CAS
CSCD
北大核心
2018年第9期1047-1053,共7页
Acta Entomologica Sinica
基金
国家重点研发计划项目(2017YFD0201900)
兵团杰出青年基金(2014CD004)