Reproductive potential and development of Callosobruchus chinensis on legumes and cereals commodities

The fecundity and development of Callosobruchus chinensis on legumes and cereals were studied in vitro from April to September. The temperature during the investigation was 30.2-34°C and relative humidity was 46-61%. The data was taken at the interval of 24 hours. The highest fecundity of C. chinensis (54.40) eggs was recorded on whole black gram and the lowest fecundity (6.8) was recorded on wheat. The adult female life was non-significance here and the longest of 8.6 days on red cowpea and the shortest of 6.2 days was determined in white cowpea. The longest adult life of male (6.2 days) was recorded on mung bean and the shortest was recorded on white whole gram. The longest egg to adult period of 18 days was recorded on lentil. The highest emergence rate (85%) was recorded on lentil and the lowest (61.54%) was recorded on white crushed gram. The highest male to female ratio (5.34:1) was calculated on whole black gram, the heaviest individual of 5.0 mg was recorded on white cowpea and the lightest (3.13 mg) was recorded on whole black gram.