日本龟蜡蚧卵期的预测预报研究

STUDIES ON PREDICTION OF OVIPOSITION PHASE OF CEROPLASTES JAPONICUS

日本龟蜡蚧是园林花卉、林木和果树的重要害虫，繁殖量大，除初孵若虫外，体被较厚蜡质，为各种防治增加了难度．准确测报若虫盛孵期，是防治该虫的关键．利用自然变温测定卵期的发育起点温度和有效积温，经测定悬铃木：C=18.02±1.69（℃），K=142.68±29.21（DD）；大叶黄杨：C=18.54±0.74（℃）．K=129.34±11.93（DD），桅子花：C=19.97±0.87（℃），K=106.81±13.92（DD），这种测定简便易行而又更符合实际，仅计算较为复杂．

Ceroplastes japonica is an important pest on garden flowers,shurbs,trees and fruits trees,which has high reproductive capacity.Since the body of its image is preserved with thick wax,it is not easy to control it with pesticides in its adult stage.Thus to make a right prediction of incubation phase becomes the key point for the pestcontrol.A method using natural variation temperature to forecast the developmental thishold temperature and the effective accumulate temperature was established in this paper.The results showed that C=18.02±1.69 (℃),K=142.68±29.21 (DD) for Plantanus hispannica C=18.54±0.74 (℃), K=129.34±11.93 (DD) for Euonymus japonicus;C=19.97±0.87(℃),K=106.81±13.92(DD) for Gardenia jasminoides.