Varietal evaluation of sorghum cultivars against lepidopteran insect pests of sorghum

Abstract

Studies were carried out on to study the performance of promising lines against the lepidopteran insect pests of sorghum at Sorghum Research Station, VNMKV, Parbhani during Kharif 2019-2020. Experiment was laid out in unprotected condition with two rows of 4m length with 45 x 15 cm spacing in to evaluate around 24 (Kharif B and R lines). Different lines of sorghum were sown in randomized block design, all these entries screened against lepidopteran insects pests of sorghum. The observations on damaged plants and number of larvae were recorded from each plot at weekly interval. The dead hearts caused by stem borer Chilo partellus revealed that minimum percentage of dead hearts were observed in genotypes 42 whereas the maximum percentage of dead hearts were indicated among the genotype susceptible to DJ6514 check (64.29) The lowest larval population of earhead worm on genotype 42 B was recorded which was at par with genotype KR 215, KR 199, 28 B, KR 125 and 99 B. Whereas the higher larval, observed in the susceptible control genotype DJ6514, was significantly higher than that of the remaining genotypes.