近年来 ,甜菜夜蛾在上海地区露地的主要发生时间是7～9月 ,比80年代提前1个月左右 ,间歇性暴发时间也缩短1～2年 ,在温室中可周年发生 ,形成了露地与温室互为虫源的局面。甜菜夜蛾对拟除虫菊酯类和有机磷类农药产生了高或中等水平的抗性 ,在化学防治上应优先选用高活性的RH2485、米满、抑太保等药剂 ,有控制地使用有机磷药剂 ,不同作用机理农药要轮换使用 ,延缓抗药性的发生和发展 In recent years, beet armyworm in Shanghai in the open area of ​​the main occurrence time is from July to September, one month earlier than in the 1980s, intermittent outbreak time is also shortened 1 to 2 years in the greenhouse can occur annually, forming a field And the greenhouse each other insects situation. Beet armyworm pyrethroids and organophosphate pesticides produced a high or medium level of resistance in the chemical control should be given priority to high activity of RH2485, meter full, anti-insured and other agents, controlled use of organophosphorus pesticides Different mechanisms of pesticides to be rotated to delay the occurrence and development of drug resistance