摘要
杨毒蛾(Leucoma candida S.)、柳毒蛾(Leuccma salicis)是杨树的主要食叶害虫。我们从1984—1987年对该虫的发生期、发生量预测预报进行了初步研究。杨、柳毒蛾幼虫的发生期是在寄主杨树,展叶后的第10 d或日平均温度达到13℃以上时,开始上树取食。该虫的发生量预报可采用越冬基数调查和回归预报式两种方法,其种群数量动态预报模型所筛选出的预报因子与虫情的复相关系数都很高,模型的显著性水平也很高。经过检验及初步预报实践,效果较好。
The Leuccma candida and L. salicis are essential leaf-eating pest insects for poplar trees. The forecasting for occurrence time, occurrence amount of larvae were studied from 1984 to 1987. The occurrence. time of the larvae is on the tenth day after the host sprouting leaf or daily mean temperature reaches to 13℃; occurrence amount is forecasting by overwintering larvae numbers and regression equation.Complex correlation coefficient betweeh forecasting factors and insects, signi ficant level are higher, the result is better.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1989年第6期58-62,共5页
Journal of Northeast Forestry University
关键词
杨柳树
柳毒蛾
发生期
发生量
预报
Leucoma candida
L. salicis
Larvae occurrence time
Occurrence amount
Forecasting
