Biology and varietal preference of pulse beetle, Callosobruchus chinensis L. on stored green gram

Abstract

The experiment was conducted to study the biology and varietal preference of pulse beetle, Callosobruchus chinensis L. The biology of pulse beetle was studied on the green gram variety “DGGS 4”. The egg laying period, incubation period, larval period, pupal period, total developmental period, total life cycle, adult longevity of both male and female, percent egg hatchability were studied. Six green gram varieties viz., Pant M-6, PUSA 0672, KM 2241, DGGS 4, IPM 2-3 and IPM 02-14 were used to evaluate the varietal preference of C. chinensis. Among these varieties studied, variety KM 2241 showed maximum percent seed damage and weight loss to pulse beetle which indicating high degree of susceptibility. Variety DGGS 4 showed minimum percent seed damage and weight loss to pulse beetle which indicating comparatively high degree of resistance.