Evaluation of different insecticides on maize stem borer, Chilo partellus (Swinhoe)

Management of Maize stem borer Chilo partellus (Swinhoe) using various insecticides in field condition was carried out during Kharif 2019-2020 at central Research field SHUATS Prayagraj, UP., India. The management of Maize Stem borer Chilo partellus (Swinhoe) was done using 8 different treatments and benefit cost ratios of all the treatments were calculated. Single spray was applied to protect the crop from Chilo partellus using randomized block design with three replications. The observations of Chilo partellus before 24 hours (Pre- treatment) and 3rd, 7th and 14th day after spraying (Post-treatment) were recorded for computing the percent of pest reduction. The data were subjected to statistical analysis after appropriate transformation for interpretation. The treatment with recommended insecticide Fipronil 0.3% G was of the most effective treatment followed with Carbofuran 3G and Spinosad 45% SC The next best treatments were found to be Chlorantraniliprole 0.4G, Cypermethrin 10% EC. Indoxacarb and Profenophos were found to be least effective against Chilo partellus (Swinhoe). The highest Benefit cost ratio was recorded with Fipronil (1:1.70) and Carbofuran (1:1.60) followed by the Spinosad (1:1.46), Chlorantraniliprole (1:1.39), Cypermethrin (1:1.28), Indoxacarb (1:1.15), Profenophos (1:1.07).