The Bt cotton is affording protection against lepidopteron insect however sucking insect pests was key pest, among them leafhopper, Amarasca biguttula biguttula Ishida (Homoptera: Cicadellidae) is serious problem throughout the crop period.Development of resistance in insect pests to insecticides is a natural phenomenon. Realizing the significance of assessing resistance development to insecticides,the bioassay was tested two insecticidal group were neonicotinoid viz., imidacloprid 17.8 SL,
thiamethoxam25 WG, acetamiprid 20 SP and organophosphate insecticides viz., acephate 75 SP and
monocrotophos 36 WSL which was found neonicotinoids at moderate level and organophosphate to low level resistance against cotton leafhopper. The resistance ratio for imidacloprid, thiamethoxamand acetamiprid was 108.68, 78.24 and 25.96 fold, respectively. In organophosphate insecticides, monocrotophosand acephatewas 29.04 fold and 9.29 fold, respectively.
Real Time Impact Factor:
Author Name: V. K. Chaudhari* H. R. Desai and N. M. Patel
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Keywords: Leafhopper, Insecticidal resistance, Amrasca bigutulla bigutulla Ishid