Bioefficacy of Chlorantraniliprole against Helicoverpa armigera (Hubner) on Cotton

Field experiments were conducted at Regional Agricultural Research station, Lam, Guntur to evaluate the efficacy of chlorantraniliprole at different doses along with standard insecticides against H. armigera on cotton for two consecutive seasons. The mean data overtwo years revealed that chlorantraniliprole @ 40 g a.i/ha and spinosad @75 g a.i/ha recorded lowest square damage inflicted by H. armigera. Chlorantraniliprole @ 40 g a.i/ha and 30 g a.i/ha, spinosad and indoxacarb exhibited similar efficacy in reducing boll damage. Among the insecticide treatments all the insecticidal treatments led to higher yields. The yield data was at par with each other except lower dose of chlorantraniliprole @ 10 g a.i/ha. The results conclude that chlorantraniliprole @ 30 g ai/ha as optimum dose for the effective control of H. armigera on cotton