大绿浮子Ci cadella viridis(L.)为华北的一种大害虫,它的食性很,一般农作物与蔬菜都受它的加害,而为害最严重者是在秋末产卵于果树及一般树木上,被产卵的枝干上伤痕累累,幼苗及细嫩的枝条每因产卵过多而枯死。著者等于1950—1952年曾在济南作此种害虫的观察,及防止其产卵的试验,兹将所得结果摘要报告于下:一、产卵习性的观察 Ci cadella viridis (L.) is a large pest in North China. Its feeding habits are very high. Generally, crops and vegetables are harmed by it. The hardest victims are spawning on fruit trees and common trees in late autumn, Been spawned branches on the scarred, seedlings and tender branches of each excessive ovulation and died. The author is equivalent to 1950-1952 in Jinan for such pests observed, and to prevent the spawning of the experiment, the results will be summarized in the following report: First, the observation of spawning habits