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1、白僵菌防治稻叶蝉效果显著。当第三代稻叶蝉孵化高峰期,于八月五日第一次在大田施用白僵菌,具体用法是将一斤白僵菌粉加清水180斤,浸泡1.5小时后过滤,天黑时喷务,两天后检查药效,叶蝉成虫死亡率77.07％—82.2％,若虫虽有所上升,主要是刚孵化的低龄若虫增加,但孵化高峰期过后,总虫数一直下降。同时,在田间随处都可看到大量死虫,虫体上长满白色菌粉,证明白僵菌对叶蝉有显著的毒杀力,在此后的几次施菌中也发生同样情况,效果一
1, Beauveria bassiana control rice leafhopper significant effect. When the third generation of rice leafhopper hatch peak, on August 5 for the first time in the field Beauveria bassiana, the specific usage is to add one kilogram of Beauveria bassiana powder 180 pounds, soaked for 1.5 hours after filtration, when dark Jet, two days later to check the efficacy, adult mortality rate of leafhopper 77.07% -82.2%, although the nymphs increased, mainly young nymphs just hatched increased, but after the peak incubation period, the total number of insects has been declining. At the same time, a large number of dead insects can be seen everywhere in the field, and the insect body is covered with white bacterial powder, which proves that Beauveria bassiana has remarkable poisonous killing force on the leafhopper, and the same situation occurs in several germs afterwards. one