摘要
经1994～1998年林间样地调查和饲养观察,查明了云杉球果小卷蛾在祁连山北坡林区的成虫羽化进度、卵孵化进度、不同发育时期的物候现象、雌雄性比及各虫态的死亡率,依据有效基数法,得到发生量预测公式.
By means of feeding observation and sampleplot survey in the forests from 1994 to 1998, the imago emergence progress, egg incubation progress, the phonological phenomena in different development phases, the female and male ratio,and the mortality rate in different insect states of Psendotomoides strobiellus growing in the northern slope forest range of Mountain Qilianshan have been found out. And based on the method of effective cardinal number, the prediction formula for insect occurrence amount has been deduced and presented here.
出处
《中南林学院学报》
CSCD
2003年第2期85-88,共4页
Journal of Central South Forestry University
基金
甘肃省科技攻关项目(GK95-2-48A).
