温度和烟草粉螟密度对麦蛾茧蜂觅食行为的影响  

Effects of Ephestia Elutella (Hübner) on Foraging Behavior of HabrobraconHebetor (Say) under Different Temperatures and Host Density

作　　者：王博 欧后丁 胡勇 王秀琴 韦兰 杨茂发[2,3] WANG Bo;OU Houding;HU Yong;WANG Xiuqin;WEI Lan;YANG Maofa(Guizhou Tobacco Company,Guiyang Branch Company,Guiyang 550002,China;Institute of Entomology of Guizhou University,Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Regions,Guiyang 550025,China;College of Tobacco Science of Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州省烟草公司贵阳市公司,贵阳550002 [2]贵州大学昆虫研究所,贵州山地农业病虫害重点实验室,贵阳550025 [3]贵州大学烟草学院,贵阳550025

出　　处：《中国烟草科学》2022年第2期38-44,共7页Chinese Tobacco Science

基　　金：贵州省烟草公司贵阳市公司科技项目(2019-03);中国烟草总公司贵州省公司科技项目(201934)。

摘　　要：为明确温度和烟草粉螟密度对麦蛾茧蜂觅食行为的影响,设置15、20、25、30和35℃梯度温度,测定了麦蛾茧蜂在不同密度烟草粉螟5龄幼虫条件下的功能反应、寄生量和产卵量。结果表明,麦蛾茧蜂的麻痹量随温度的升高和烟草粉螟密度的增大而增大,其功能反应为Holling Ⅱ模型;麦蛾茧蜂的瞬时攻击率(a)随温度的升高先增大后降低(25℃最大),处理时间(T_(h))随温度的升高而缩短;在30~35℃条件下麦蛾茧蜂对烟草粉螟的控害潜力(a/T_(h)和T/T_(h))最大。麦蛾茧蜂的寄生量、产卵量和转化率均随温度的升高而增大,随烟草粉螟密度的增大而减小。当温度在30~35℃和烟草粉螟为5~10头/盒时,麦蛾茧蜂的寄生量、产卵量和转化率较高。本研究为大量饲养和利用麦蛾茧蜂防治烟草粉螟等仓储害虫提供了理论依据。The effects of density of Ephestia elutella(Hübner)(Lepidoptera:Pyralidae)on foraging behaviors of Habrobracon hebetor(Say)(Hymenoptera:Braconidae)under various temperatures were examined in this study by measuring functional responses,the number of parasitized hosts,and the number of eggs laid of H.hebetor under five constant temperatures(15,20,25,30 and 35℃)at different host larval densitiesof the 5^(th) instar E.elutella.The results revealed that the number of hosts paralyzed by H.hebetor increased with the increase of host density and temperature,it exhibited a Holling’s Ⅱ disc equation under various temperatures.The instantaneous attack rate(a)increased and then decreased with the increase of temperature,and the handling times(Th)decreased with the increase of temperature.However,the maximum control efficiency(a/T_(h))and theoretical maximum attack rate(T/T_(h))of H.hebetor on E.elutella were found at 30-35℃.In addition,the number of parasitized hosts,the number of eggs laid,and the efficiency of conversion(ECI)of H.hebetor decreased with the increase of host density,although they increased with the increase of temperature.Namely,the number of parasitized hosts,the number of eggs laid,and the ECI were relatively higher at temperatures 30-35℃and low host densities(5 and 10),which were favorable to the mass-rearing of the wasp.In conclusion,the results of this study provide a theoretical basis for the control of storage pests including E.elutella by mass rearing and utilization of this parasitoid.

关 键 词：烟草粉螟 麦蛾茧蜂 麻痹 寄生 功能反应 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]