上海市甜菜夜蛾的发生与防治

The Occurrence and Control of Laphygma exigua Hübner in Shanghai

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 。

In recent years,Laphygma exigua Hübner place mainly in July to September.The period is one month earlier than it is in 80' and it is break out more frequently. In greenhouse,you could found beet armymoth all over the year. Greenhouses and open fields are become an insect source for each other. Middle to high resistance of beet armymoth to pyrethroid and organophosphate chemicals has monitorted. To control Laphygma exigua Hübner for RH2485、Mimic、Atabron are suggested first,alter with different mechanism insecticides such as organophosphate insecticides,to avoid and delay of resistance.