几种林业害虫在崇明岛的发生规律研究

Occurrence Regularity of Several Forest Pests in Chongming Island

[目的]探究茶尺蛾、樟巢螟、杨扇舟蛾、黄刺蛾4种蛾类害虫在崇明岛的生活史和发生趋势,为今后的虫害防治提供参考。[方法]生活史的调查采用标准地设置后的系统调查;发生趋势采用灯光引诱法进行调查。[结果]结果表明：茶尺蛾、樟巢螟、黄刺蛾在崇明岛每年发生2代,而杨扇舟蛾发生4～5代;杨扇舟蛾以卵越冬,其余3种害虫都以幼虫越冬;茶尺蛾的为害高峰期主要在8月,其余3种害虫有2个为害高峰期,分别为6月和8月。从发生趋势来看,茶尺蛾和杨扇舟蛾的诱集量在不断增大,而樟巢螟和黄刺蛾的诱集量变化不大。[结论]该研究为崇明岛今后的害虫防治提供了一定的科学依据。

[ Objective] The aim of the research was to explore the life cycle and occurrence trend of Ectropis obliqua Warren, Orthaga achatina Bulter, Clostera anachoreta （ Fabricius ） and Cnidocampa flavescens Walker and give reference to future insect pest control. [ Method] The life cycle and the occurrence trend were surveyed through systematic investigation after setting sample plot and hght trapping method respectively. [ Result ] Ectropis obliqua Warren, Orthaga achatina Bulter and Cnidocampa flavescens Walker occurred 2 generations per year, but Clostera anachoreta （Fabricius） occurred 4- 5 generations per year. The overwintering of Clostera anachoreta （Fabricius） was through eggs, while other 3 kinds of insect pests were through larvae. The infection peak of Ectropis obliqua Warren occured in August, while other 3 kinds of insect pests occured in June and August respectively. From the trend perspective, the trapping effect of Ectropis obliqua Warren and Clostera anachoreta （Fabricius） were increasing constantly while that of Orthaga achatina Bulter and Cnidocampa flavescens Walker changed little. [ Conclusion ] This research provided scientific basis for the forest insect control in Chongming.