摘要
为明确黄足肥螋Eurellia pallipes对草地贪夜蛾Spodoptera frugiperda的捕食能力,在室内于(28±1)℃,L//D=16 h//8 h条件下,研究了黄足肥螋成虫对草地贪夜蛾2龄幼虫的捕食功能与搜寻效应。结果表明:黄足肥螋成虫对草地贪夜蛾2龄幼虫具有较强的捕食作用,捕食时,黄足肥螋先用尾铗夹伤草地贪夜蛾幼虫或造成其死亡后再取食,持续取食时间最长达22 min,最短6 min,平均取食时间为(10.3±3.3) min。通过HollingⅡ模型对捕食作用数据进行拟合,发现其对草地贪夜蛾2龄幼虫的捕食功能反应属于HollingⅡ模型,日最大捕食量为62.5头,瞬时攻击率和处理时间分别为0.951和0.016 d。黄足肥螋成虫对草地贪夜蛾2龄幼虫表现出一定的搜寻效应,但在一定的空间内随着猎物密度的增加其搜寻效应逐渐降低。由此表明,黄足肥螋成虫对草地贪夜蛾低龄幼虫具有较好的防控潜力。
To clarify the predation and control ability of Eurellia pallipes on Spodoptera frugiperda, the predation function and searching efficiency of both male and female adults of E.pallipes on the 2nd instar of S. frugiperda were studied in an light incubator at(28±1)℃ and L//D=16 h//8 h. The results showed that E.pallipes adults have a strong predation effect on the 2nd instar larvae of S. frugiperda. When hunting, they often clip the S. frugiperda larvae with forceps first, causing prey injury or death, and then feed. The longest feeding time was 22 min, and the shortest was 6 min, with an average feeding time of(10.3±3.3) min. The data fitting results showed that the functional responses of E.pallipes adults to the density of the 2nd instar larvae of S. frugiperda fitted well with HollingⅡ model. Daily maximum predation, instantaneous attack rate and treatment time of E.pallipes adults to 2nd instar larvae of S. frugiperda were 62.5 individuals, 0.951 and 0.016 d, respectively. E.pallipes adults showed the certain searching efficiency on the 2nd instar larvae of S. frugiperda, but the searching efficiency decrease gradually with the increase of prey density in a certain space. E.pallipes adults showed a good control effect on S. frugiperda larvae, and have good control potential on S. frugiperda.
作者
赵英杰
符成悦
徐天梅
郑亚强
王文倩
孔德鸿
陈斌
李正跃
ZHAO Yingjie;FU Chengyue;XU Tianmei;ZHENG Yaqiang;WANG Wenqian;KONG Dehong;CHEN Bin;LI Zhengyue(College of Plant Protection,Yunnan Agricultural University,State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan,Kunming 650201,China)
出处
《植物保护》
CAS
CSCD
北大核心
2019年第6期35-38,54,共5页
Plant Protection
基金
国家重点研发计划(2018YFD0200703)
国家自然科学基金(31660537,31760519)
关键词
黄足肥螋
草地贪夜蛾
功能反应
搜寻效应
Eurellia pallipes
Spodoptera frugiperda
functional response
searching efficiency
