Pantnagar Journal of Research

Abstract

Nineteen rice genotypes were evaluated by standard seed box screening technique, honeydew test, nymphal survival method and days to wilt test for resistance against brown planthopper (BPH) under glasshouse conditions. Five genotypes, IR 36, IR-65482-7-2-216-1-2-B, PTB 33, RP 2068-18-3-5 and T12 were found to be resistant with a damage score ranging from 1.4 to 4.1. The resistant genotypes showed very less honeydew secretion and nymphal survival rate as compared to the susceptible entries, however, the days taken to wilt was comparatively longer on the resistant entries. Among the entries evaluated, RP 2068-18-3-5 was found to be the most resistant cultivar with a damage score of 1.4, secreting 22.75 mm 2of honeydew, 23.4 per cent nymphal survival and 18.6 days to wilt, respectively.