Biology of pulse beetle, Callosobruchus chinensis (Linnaeus) on different genotypes of green gram

Abstract

The laboratory experiments were conducted to study the biology of Callosobruchus chinensis Linnaeus on different varieties of green gram viz., DSPS 6-13, CD 6-52, D-SPS-6, SPS-6-10, BM-2003-2, CD 6-53, BM-2002-1 under laboratory conditions at the Post Graduate Laboratory, Department of Agril. Entomology, College of Agriculture, Latur during 2023-24. The higher mean incubation period (6.20 days) was observed in BM-2003-2 and the shortest incubation period (4.89 days) in BM-2002-1. The highest larval-pupal duration was noticed on SPS-6-10 (26.33 days) and the shortest on BM-2002-1 (24.24 days). The highest adult emergence (72.00 percent) was observed on BM-2002-1 and the lowest in SPS-6-10 (58 percent). The highest adult longevity of male C. chinensis was registered in SPS-6-10 (9.98 days) and lowest were observed in BM-2002-1 (8.08 days). The maximum adult longevity of female was recorded in CD 6-52 (13.07 days) and the minimum were noticed in BM-2003-2 (10.33 days). The highest sex ratio of C. chinensis was registered in SPS-6-10 (1:1.14) and lowest sex ratio was observed in BM-2002-1 (1:1.05).