雌蜂日龄和寄主虫态对亚利桑那跳小蜂寄生行为和子代蜂发育表现的影响  

Effects of host life stage and female wasp's age on parasitizing behaviors and offspring developmental consequences in Aenasius arizonensis(Hymenoptera:Encyrtidae)

作　　者：吕宇佳 郭晓萌 秦文权 孟玲[1] 李保平[1] LU Yu-Jia;GUO Xiao-Meng;MENG Ling;LI Bao-Ping;QINWen-Quan(School of Plant Protection,Nanjing Agricultural University,Nanjing 210095,China;Institute of Hilly Land Agriculture of Zhenjiang City,Jiangsu Province,Jurong 212499,China)

机构地区：[1]南京农业大学植物保护学院,南京210095 [2]江苏省丘陵地区镇江农业研究所,句容212499

出　　处：《应用昆虫学报》2024年第5期989-994,共6页Chinese Journal of Applied Entomology

基　　金：国家重点研发计划项目(2017YFE0104900)

摘　　要：【目的】本研究旨在明确雌蜂日龄如何影响亚利桑那跳小蜂Aenasius arizonensis对扶桑绵粉蚧Phenacoccus solenopsis不同虫态寄主的寄生行为和子代蜂发育结果。【方法】分别以扶桑绵粉蚧3龄若虫和刚羽化雌成虫为寄主,每日供雌蜂寄生直至其死亡,观测雌蜂的检查寄主和产卵行为(触角敲击寄主的时间和频次,产卵器刺扎寄主的频次)以及产出的子代蜂成虫体型大小;分析这些特征随雌蜂日龄增长的变化趋势如何受寄主龄期的影响。【结果】亚利桑那跳小蜂对粉蚧雌成虫的触角敲击时间长于对粉蚧3龄若虫的敲击时间,但与雌蜂日龄无关;产卵器刺扎粉蚧成虫的时间长于刺扎3龄若虫,均随雌蜂日龄增大而延长,但产卵器刺扎寄主频次不受寄主虫态的影响,而随雌蜂日龄增大而大幅降低。寄生粉蚧成虫产出的子代蜂成虫体型大于寄生粉蚧3龄若虫的子代蜂,但雌蜂日龄对子代蜂体型大小没有影响。【结论】亚利桑那跳小蜂雌蜂的日龄只影响其对扶桑绵粉蚧的探测行为,而寄主虫态既影响探测行为亦影响子代蜂发育表现。[Aim]This study aims to determine how female wasp's age influences oviposition-related behaviors and offspring developmental consequences of the parasitoid Aenasius arizonensis,a biocontrol agent attacking different life stages of the invasive cotton mealybug Phenacoccus solenopsis.[Methods]The 3rd instar nymph and neonatal female adult of the mealybug were exposed to parasitism by A.arizonensis females every day across their lifetime.Female's examination/oviposition behaviors and offspring body size at eclosion were measured and analyzed in relation to female age and host life stage at parasitism.[Results]Aenasius arizonensis females exercised a longer time for both antennal tapping and ovipositor-drilling on female adult mealybugs than on 3rd instarnymphs,but these behaviors were not affected by female wasp's age.Female wasps conducted more frequent drilling with the ovipositor on the female adult mealybug than on the 3rd instar nymph and markedly decreased the drilling frequency over female's age.Body size of offspring adults was larger from attacking the adult mealybug than attacking the 3rd instar nymph but did not vary with female's age.[Conclusion]Female wasp's age only influences host-examining behaviors while host life stage has an effect on both host-examining behaviors and offspringdevelopmentaloutcome.

关 键 词：扶桑绵粉蚧 传统生物防治 寄生性天敌 入侵害虫 日龄 寄主品质 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]