油菜螟的预测预报及防治指标模型的研究

Forcast of Yield Loss and Damage Caused by Rape Worm,Evergestis extimalis Scopi

根据近7a 来积累的气象资料和黑光灯诱集大田为害程度调查数据及室内幼虫取食量测定资料,提出了油菜螟的为害程度分级,为害损失预测模型、为害程度的预测模型和确定防治指标的动态模型.

Rape worm,Evergestis eximalis Scopi is an intermittent pest attacking spring r ape in the middle of Gansu province. Based on weather data,acumulated adult unmbers traped by a ultra-violes light in the middle-ten days in July,larval eating capacity,damage degree caused by its larvae on the field in Augest from 1989 throgh 1995 in Linxia,a loss model,an action threshold model and a damage degree forcasting model were developed.