叉角厉蝽成虫对粘虫幼虫的捕食功能反应  

Predatory function response of adult of Eocanthecona furcellata(Wolff)to the larvae of Mythimna seperata(Walker)

作　　者：廖贤斌 高平 赵航 谢永辉[2] 陈雅琼 王志江[2] 陈斌[1] 吴国星[1] 高熹[1] LIAO Xian-bin;GAO Ping;ZHAO Hang;XIE Yong-hui;CHEN Ya-qiong;WANG Zhi-jiang;CHEN Bin;WU Guo-xing;GAO Xi(College of Plant Protection,Yunnan Agricultural University,Kunming 650201,China;Kunming Branch of Yunnan Provincial Tobacco Company,Kunming 650021,China)

机构地区：[1]云南农业大学植物保护学院,昆明650201 [2]云南省烟草公司昆明市公司,昆明650021

出　　处：《南方农业学报》2020年第8期1992-1997,共6页Journal of Southern Agriculture

基　　金：国家重点研发计划项目(2018YFD0200703,2018YFD0200308);云南省烟草公司科技计划项目(2018530000241010)。

摘　　要：【目的】探明室内叉角厉蝽对粘虫幼虫的捕食潜力,为叉角厉蝽应用于田间防治粘虫提供理论依据。【方法】以透明塑料盒为测试容器,在室内设不同密度(3、6、9、12和15头/盒)的3、4和5龄粘虫幼虫供叉角厉蝽成虫(1头/盒)取食,统计叉角厉蝽成虫的捕食量并进行相关分析。固定粘虫幼虫密度(50头/盒),设不同密度(1、2、3、4和5头/盒)的叉角厉蝽成虫,研究捕食者自身密度对捕食量的影响。等比例(天敌∶猎物=1∶10)增加叉角厉蝽成虫和粘虫幼虫,研究干扰反应对捕食量的影响。【结果】叉角厉蝽成虫对3、4和5龄粘虫幼虫的捕食功能反应均符合HollingⅡ模型。在室内条件下,叉角厉蝽成虫对4和5龄粘虫幼虫的理论最大取食量分别为10.09和3.55头,明显低于对3龄粘虫幼虫的理论最大取食量(78.74头)。叉角厉蝽成虫对3、4和5龄粘虫幼虫的搜寻效应方程分别为S=0.9009/(1+0.0114N)、S=0.7291/(1+0.0723N)和S=0.9322/(1+0.2626N),在相同虫龄内,搜寻效应随着猎物密度的增加而减小。捕食者密度对搜寻效应的影响及干扰反应的拟合结果分别为E=0.4254P-0.551和A=8.3413P-0.127,随着捕食者密度的增加,叉角厉蝽的平均捕食量都会逐渐减少,叉角厉蝽成虫与粘虫幼虫等比例增加时,叉角厉蝽也会产生种间干扰。【结论】叉角厉蝽成虫对3龄粘虫幼虫具有较好的捕食潜力,因此选择粘虫幼虫3龄时释放叉角厉蝽成虫为宜,但在田间实际释放时需考虑叉角厉蝽自身密度及种间干扰对其捕食能力的影响。【Objective】The predatory potential of Eocanthecona furcellata(Wolff)to the Mythimna seperata(Walker)larvae was explored,which provided a theoretical basis for control of E.furcellata to the M.perata larvae in field.【Method】With transparent plastic box as container,different densities of 3rd,4thand 5th instar M.seperata larvae(3,6,6,9,12 and 15 ind/box)were set up indoors to feed on adults of E.furcellata(1 ind/box),and the predations of E.furcellata were counted and analyzed.The density of the M.perata larvae(50 ind/box)was fixed,and the adults of M.perata were set with different densities(1,2,3,4 and 5 ind/box)to study the effect of the M.seperata density on the predation.Increasing the E.furcellata adult and M.perata larvae in equal proportions(natural enemy:prey=1:10),and the effect of interference response to predation was studied.【Result】The results showed that the predation function of the 3rd,4th and 5th instar larvae of the M.seperata was consistent with the HollingII model.Under indoor conditions,the maximum theoretical predation of E.furcellata adult on 4th and 5th larvae of the M.perata were 10.09 and 3.55,which were lower than those on the 3rd instar larvae(78.74).The search effect equations of E.furcellata adult on the 3rd,4th,and 5th instar larvae of M.perata were S=0.9009/(1+0.0114N),S=0.7291/(1+0.0723N),S=0.9322/(1+0.2626N).During the same age period,the search effect decreased as the prey density increased.The effect of predator density on the search effect and the fitting results of the interference response were E=0.4254P-0.551 and A=8.3413P-0.127.With the increase of predator density,the amount,average predation of E.furcellata on the M.perata larvae gradually decreased.When E.furcellata adult and M.seperata larvae proportional increased,E.furcellata adult also produced interspecific interference.【Conclusion】Studies have shown that E.furcellata adult has good predation potential for 3rd larvae M.seperata.When M.seperata larvae is 3rd instar,it has better control effect when rel

关 键 词：叉角厉蝽 粘虫 捕食功能 干扰反应 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治] S433.4[农业科学—植物保护]