Effect of neem oil on survival of the rice brown planthopper, Nilaparvata lugens Stal (Homoptera: Delphacidae) and on grassy stunt and ragged stunt virus transmission
1985
Saxena, R.C. | Khan, Z.R.
Neem (Azadirachta indica A. Juss) seed oil was found highly effective in reducing the survival of brown planthopper, Nilaparvata lugens Stal (Homoptera:Delphacidae) and in suppressing transmission of grassy stunt and ragged stunt viral diseases of rice. Generally, insect survival and disease transmission decreased with increasing neem oil concentrations. After 3 days of exposure, the insect failed to transmit the viruses to plants sprayed with 50% neem oil, compared with control plants where virus transmission was successful. Thus neem seed oil possesses potential for control of brown planthopper and its transmitted grassy stunt and ragged stunt viral diseases of rice
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