Evaluation of chickpea varieties / genotypes for their susceptibility to C. maculatus (fabricius)

Abstract

Varietal susceptibility of ten chickpea varieties / genotypes to Callosobruchus maculatus was evaluated based on four parameters viz., ovipositional preference, Index of suitability, population growth and weight loss during storage in chickpea along with relationship between seed weight and hardness. Adult weight was recorded maximum in the variety GG-5 which recorded not only the highest oviposition preference, percentage survival, index of suitability but also maximum longevity of males and females. Amongst the different chickpea varieties / genotypes evaluated for their varietal susceptibility, JGK-1 and KAK-2 were categorized as resistant (R) based on oviposition preference, index of suitability, adult emergence on C. maculatus and weight loss. GJG-3 and GJG-6 were less susceptible (LS) based on all the four parameters. Moderately susceptible (MS) varieties were GAG-1423, GAG-1425 and GG-1 based on oviposition preference, index of suitability and weight loss whereas GG-2 and Dahod Yellow were also moderately susceptible accounted to weight loss. Genotype GG-5 was highly preferred for oviposition by females with more number of adults emerged, higher index of suitability and also higher weight loss. Thus, GG-5 was labelled as highly susceptible (HS) to C. maculatus on the basis of all the four criteria.