Abstract:

In order to provide reference for controlling N. lugens, the toxicities of 4 kinds of botanical insecticides Against Nilaparvata lugens (St?l) were studied. Rice stem dipping method and toxic film method were used to test the toxicities of 4 kinds of botanical insecticides on the third instar nymphs and adults of N. lugens under laboratory conditions. The results tested by rice stem dipping method and toxic film method showed that the weakest toxicity was rotenone on the third instar nymphs and adults of N. lugens, and the values of LC50 were 10.7791, 14.9197 and 21.4638 mg/L, respectively. The toxicity of veratrine was strongest, and the values of LC50 were 0.7688, 1.1852 and 1.4366 mg/L, respectively. Among 4 kinds of botanical insecticides on the N. lugens, veratrine, matrine and nicotine?matrine had a better control effect.