摘要
七星瓢虫、异色瓢虫、星豹蛛、草间小黑蛛四种捕食性天敌对花生蚜的捕食作用是随猎物的密度增加而增大,随其本身密度的增加而减少。用Holling-Ⅲ型功能反应模型进行拟合,其数学模型为Na=(a’TNt)/(1+a’TnNt)。通过计算日最大捕食量四种天敌依次为162.2、172.5、56.8、13.8头。数学模拟的理论值与实际观察值十分接近,经卡方检验,差异不显著(P<0.05),说明可以用来描述四种天敌捕食功能反应情况。
The effect of four predational natural enemies,Coccinella septempunctata,Harmonialleis axyridis,Pardosa astriciqoral,Frigonidium gramimicla on reducing peanut aphis was analysed in this paper.The effect was increased with the density of peanut aphis and decreased with their own densities.The function was stimulated with the mathematic models of Holling Ⅲ as:Na=(a' TNt)/(1+a' TnNt) The largest predatory populations of the four natural enemies were 162.24,171.51,56.47,13.78 respectively.
出处
《中国油料》
CSCD
北大核心
1993年第2期25-28,F004,共5页
关键词
花生
天敌
蚜虫
防治
Coccinella septempunctata
Harmonialleis axyridis
Pardosa astricigoral
Frigonidium gramimi-cla
Peanut aphis
