2024, Vol. 9, Special Issue 1

The present research on “Bio efficacy of different insecticides against pink bollworm, Pectinophora gossypiella (Saunders) infesting Bt cotton” was carried out at Village: Daliya, Ta. Gondal, Dist. Rajkot during Kharif, 2020-21. The results of experiment were revealed that Chlorantraniliprole 9.3 + lambda-cyhalothrin 4.6 ZC 0.007% was found significantly superior than the rest of the treatments, but it was found at par with novaluron 5.25 + indoxacarb 4.5 SC 0.017% and profenophos 40 + cypermethrin 4 EC 0.088% at seven and fourteen days after first and second application against rosette flower and green boll damage due to pink bollworm. Profenophos 40 + cypermethrin 4 EC 0.088% and indoxacarb 14.5 SC 0.012% followed by chlorpyriphos 50 + cypermethrin 5 EC 0.110% and deltamethrin 2.8 EC 0.003% were next in order. Profenophos 50 EC0.125% and chlorpyriphos 20 EC 0.040%were proved to be least effective against this pest. The highest Incremental Cost Benefit Ratio (ICBR) (1:16.55) was obtained with the treatment of profenophos + cypermethrin followed by chlorantraniliprole 9.3 + lambda-cyhalothrin (1:9.79) and chlorpyriphos (1:9.61). Among the different insecticides, chlorantraniliprole 9.3 + lambda cyhalothrin 4.6 ZC 0.007% found most effective insecticidal treatment against pink bollworm.