摘要
在室内以六点始叶螨Eotetranychus sexmaculatus(Riley)为猎物观察了拟小食螨瓢虫Stethorusparapauperculus Pang的发育历期、捕食量、捕食作用及干扰效应。研究结果表明:拟小食螨瓢虫取食六点始叶螨时完成一个世代需23.2 d,幼虫1～4龄的捕食量分别为9.5、14.5、19.5、64.2头六点始叶螨成螨;成虫期对六点始叶螨成螨的捕食量高达880.4头,拟小食螨瓢虫对六点始叶螨的捕食作用符合HollingⅡ方程,拟合的模型方程为Na=1.3843 N/(1+0.0231N),日均最大捕食量为43.29头;拟小食螨瓢虫的捕食率与个体间的干扰效应用Hassell-Varley(1959)模型拟合为E=0.4690P-0.5470。
Predatory behavior of the lady beetle Stethorus parapauperculus Pang on Eotetranychus sexmaculatus（Riley） was investigated under laboratory conditions.The mean development time of S.parapauperculus feeding on E.sexmaculatus was 23.6 d.1st-4th instar S.parapauperculus larvae can prey on 9.5,14.5,19.5,64.2 adult spider mites respectively,while adults can prey on 880.4 spider mites.The functional response of the adult lady beetle to E.sexmaculatus fitted the Holling model Na=1.3843N/（1 ＋ 0.0231N）,and a χ2 test confirmed that the theoretical value calculated by the fitted Holling disc equation conformed well with observed values.The functional response of adult S.parapauperculus to their own density fitted the Watt model;E = 0.4690P-0.5470.
出处
《昆虫知识》
CSCD
北大核心
2010年第6期1236-1239,共4页
Entomological Knowledge
基金
国家支撑计划(2007BAD48B00-003)
海南省基金(309050)
关键词
六点始叶螨
拟小食螨瓢虫
功能反应
干扰效应
Eotetranychus sexmaculatus
Stethorus parapauperculus
functional responses
interference effect
