大红犀猎蝽对草地贪夜蛾3龄幼虫捕食功能反应
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Citation：侯峥嵘,孙贝贝,刘先建,尹哲,李金萍,郭喜红.大红犀猎蝽对草地贪夜蛾3龄幼虫捕食功能反应.Journal of Plant Protection,2020,47(4):852-858
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Author NameAffiliationE-mail
HOU Zhengrong Beijing Station of Plant Protection, Beijing 100029, China  
SUN Beibei Beijing Station of Plant Protection, Beijing 100029, China  
LIU Xianjian Guizhou Zhuohao Agricultural Technology Co., Ltd., Zunyi 563100, Guizhou Province, China  
YIN Zhe Beijing Station of Plant Protection, Beijing 100029, China yinzhe1216@163.com 
LI Jinping Beijing Station of Plant Protection, Beijing 100029, China  
GUO Xihong Beijing Station of Plant Protection, Beijing 100029, China  
中文摘要:为探明天敌昆虫大红犀猎蝽Sycanus falleni对草地贪夜蛾Spodoptera frugiperda幼虫的捕食潜力，在室内条件下测定大红犀猎蝽3龄若虫和成虫对草地贪夜蛾3龄幼虫的捕食功能反应、搜寻效应，以及不同自身密度对捕食草地贪夜蛾的干扰反应。结果表明：大红犀猎蝽3龄若虫和成虫对草地贪夜蛾3龄幼虫的捕食功能反应符合Holling Ⅱ模型；其中大红犀猎蝽3龄若虫对草地贪夜蛾3龄幼虫的日最大捕食量、瞬时攻击率和处理时间分别为4.049头、1.198和0.247 d；大红犀猎蝽雌成虫对草地贪夜蛾3龄幼虫的日最大捕食量、瞬时攻击率和处理时间分别为47.619头、0.717和0.021 d；大红犀猎蝽雄成虫对草地贪夜蛾3龄幼虫的日最大捕食量、瞬时攻击率和处理时间分别为43.478头、0.650和0.023 d；大红犀猎蝽的捕食量与害虫密度正相关，搜寻效应与害虫密度负相关。大红犀猎蝽自身密度对捕食作用的干扰效应符合Hassell模型，对草地贪夜蛾3龄幼虫的捕食作用率随自身密度的增加而降低。表明大红犀猎蝽3龄若虫和成虫对草地贪夜蛾3龄幼虫均有一定的捕食能力，大红犀猎蝽成虫的捕食作用大于3龄若虫。
中文关键词:大红犀猎蝽  草地贪夜蛾  捕食功能反应  搜寻效应  干扰反应
 
Predatory functional response of assassin bug Sycanus falleni to the larvae of fall armyworm Spodoptera frugiperda
Author NameAffiliationE-mail
HOU Zhengrong Beijing Station of Plant Protection, Beijing 100029, China  
SUN Beibei Beijing Station of Plant Protection, Beijing 100029, China  
LIU Xianjian Guizhou Zhuohao Agricultural Technology Co., Ltd., Zunyi 563100, Guizhou Province, China  
YIN Zhe Beijing Station of Plant Protection, Beijing 100029, China yinzhe1216@163.com 
LI Jinping Beijing Station of Plant Protection, Beijing 100029, China  
GUO Xihong Beijing Station of Plant Protection, Beijing 100029, China  
Abstract:In order to ascertain the potential predation capacity of the natural enemy Sycanus falleni on the larvae of fall armyworm Spodoptera frugiperda, the predatory functional response, searching efficiency and mutual interference effect of the 3rd-instar nymphs and adults of S. falleni on the 3rd-instar larvae of S. frugiperda were studied in the laboratory. The results showed that the functional responses of S. falleni 3rd-instar nymphs and adults to the 3rd-instar larvae of S. frugiperda fitted well with Holling Ⅱ model. Daily maximum predation, instantaneous attack rate and handling time of the 3rd-instar nymphs of S. falleni to the 3rd-instar larvae of S. frugiperda were 4.049 individuals, 1.198 and 0.247 d, respectively. Daily maximum predation, instantaneous attack rate and handling time of the female adults of S. falleni to the 3rd-instar larvae of S. frugiperda were 47.619 individuals, 0.717 and 0.021 d, respectively. Daily maximum predation, instantaneous attack rate and handling time of the male adults of S. falleni to the 3rd-instar larvae of S. frugiperda were 43.478 individuals, 0.650 and 0.023 d, respectively. The predation quantity of S. falleni was positively correlated with its prey density, while the searching efficiency was negatively correlated with its prey density. The mutual interference effect of its own density on predation ratio on the 3rd-instar larvae of S. frugiperda decreased with increasing density of the predator. The results indicated that S. falleni could partly control S. frugiperda, and the predation efficiency of adult was greater than that of the larvae．
keywords:Sycanus falleni  Spodoptera frugiperda  predation functional response  searching efficiency  mutual interference
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