KASONGO MUNYINGA Yvonne*, LEMA-KI-MUNSEKI Albert, LUMPUNGU KABAMBA Christophe, BANGATA BITHA NYI MBUNZI Jean Christian

Evaluation of loss of common bean seed by bruchs (Acanthoscelides obtectus Say) during bruchs breeding under laboratory conditions.

This study aims to evaluate the loss and to specify the importance of the damage done by bruchs on common bean. A hog mass culture is carried out, under laboratory conditions. The breeding was conducted during 5 weeks by seeding 15 pairs of weevils in 30 g of common bean seeds in 11 petri dishes; the control was a Petri dish with 30 g of bean seeds without insects. The results obtained show that: in the control Petri dish, the bean seeds kept their weight whereas in the 11 seeded petri dishes the mass of weevil increased from 0.133 to 2.299 g and their average number rose from about 30 to 519 weevils. The average loss of the bean seed mass is estimated at 33.20%, from 30.223 g to 20.166 g. The damage caused by the weevil, in breeding, expresses by the weight loss, is accompanied by the deterioration of the commercial quality of common bean seeds. Télécharger l'article