Évaluation de Pertes Causées sur les Graines de Haricot Commun par la Bruche (Acanthoscelides Obtectus Say) au Cours de l’Elevage des Bruches en Condition de Laboratoire.

ABSTRACT
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.