Evaluation of some insecticides for the control of maize stem borer, Chilo partellus (Swinhoe)

The efficacy of seven insecticides including biopesticides against Chilo partellus (Swinhoe) on maize was evaluated on plants where ten one day old neonate larvae were released next day after application of insecticides. The single application of deltamethrin @ 175 ml in 250 liters of water at 15 days after germination proved to be the most effective treatment, exhibiting lowest infestation (5.79%) and lowest leaf injury rating score (1.07) with no dead hearts. Fipronil 5 EC was the next best treatment followed by the treatment with endosulfan 35 EC. However, considering overall data and C:B ratio, deltamethrin and endosulfan emerged as effective and economical treatments.