Categorization of rice genotypes against paddy black beetle, Heteronychus lioderes Redtenbacher (Scarabaeidae: Coleoptera)

Abstract

Screening of sixty-three rice genotypes against paddy black beetle was done at Tikkri (Kangra), Himachal Pradesh. Categorization of genotypes was carried out in terms of percent tiller infestation caused by the beetle by converting the values to a 0-9 scale. None of the genotypes recorded damage score of 0 to 1. The entries namely T-23 and Vallabh Basmati-24 recorded damage score of 3 (low infestation) and were designated as moderately resistant while all other genotypes were categorized under moderately susceptible, susceptible and highly susceptible.