Evaluation of Chlorantraniliprole (coragen 20 Sc) against Maize Stem Borers

A field experiment was conducted during Kharif 2009 and rabi 2009-10 at Maize Research Centre, Rajendranagar, Hyderabad with the maize hybrid (30V92) in Randomized Block Design with seven treatments for bio-efficacy i.e., coragen 30, 40, 50 and 60 g a.i/ha along with two standard checks, carbaryl 50 WP @ 700 g a.i/ha, endosulfan 35 EC @ 350 g a.i/ha and an untreated control against maize stem borers. Stem borer damage in terms of per cent infestation and per cent dead hearts in four dosages of coragen varied between 1.27 to 2.96 and 0.0 to 0.68 during Kharif, 1.06 to 5.60 and 0.0 to 4.31 during Rabi. The population of Coccinella spp. remained unaffected.Phytotoxicity symptoms were not noticed on maize crop.