摘要
本文采用捕食性天敌日控量的方法,对斜斑鼓额食蚜蝇末龄幼虫的捕食功能进行了测定。初步建立了日控蚜量(y)与苹果黄蚜密度(x)相关数学模型:y=-146.960+4.524x-0.021x^2(r=0.9976 P<0.05),当 x=107.71≈108头时.其最大日控蚜量 y=97头,失控点 x_1=175.6≈176头。
The predatory function of the late instar larvae of Lasiopticus pyrastri
was determined.The mathematical model of correlation between daily contro-
lling aphids number(y)and density(x)of Aphis pomi was established tent-
afively as follow y=-146.960+4.524x-0.021x^2(r=0.9976 p〈0.05).As
x=108 aphids,the maximum control capacity(y)was 97 aphids.The number
out of control x=176 aphids.
出处
《昆虫天敌》
CSCD
1990年第3期105-107,共3页
Natural Enemies of Insects
关键词
食蚜蝇
时空蚜量
数学模型
Syrphid fly Daily control aphids number Mathematical model
