短稳杆菌对茶尺蠖药效试验

农业部2年4地药效试验结果表明,短稳杆菌100亿孢子/ml悬浮剂对抗药性较强的小菜蛾、斜纹夜蛾、稻纵卷叶螟幼虫有较高的致死效果。为探讨该药对茶树害虫的应用价值,本试验选择茶尺蠖为应用对象,以当地常用的高效氯氰菊脂4.5%乳油为对照,进行药效对比。结果表明：药后1 d,茶尺蠖低龄幼虫全部死亡,3龄以上高龄幼虫部分死亡;药后3 d,茶尺蠖幼虫死亡率高达100%,且药后3~7 d内未见田间有新的茶尺蠖幼虫出现。由此可见,短稳杆菌100亿孢子/mL悬浮剂对茶尺蠖也具有较高的致死效果。

Efficacy of Empedobacter brevis against Tea Geometrid

According to agriculture efficacy tests in four plots of China Agriculture Department during 2 years, there was a better lethal effect of suspending agent of 10 billion spores/ml of Empedobacter brevis which had stronger resistance of pesticides to Plutella xylostella, Prodenia litura and Cnaphalocrocis medinalis. In order to explore the application value of the pesticide to tea pests, we chose tea geometrid for the test objects and the 4.5% Cypermethrin EC missible oil as the control insecticide. The results indicated that 1 day after application, all young larvae of tea geometrid were dead, and some third instar and older larvae were dead. Three days after application, all larvae of tea geometrid died, and there were no new tea geometrid founded in the fields 3-7days after application. These results showed that, it had better lethal effect of suspending agent of 10 billion spores/ml ofEmpedobacter brevis to the tea geometrids.