The suitability of leaf powders of two plants in protecting cowpea seeds
from attack by Callosobruchus rnaculatus during storage was evaluated using
various dosages of the various leaf powders 5, 10 and 15 g per 108 g seed. Both
the powdered leaf of O. gratissimum and powdered peel of Citrus sinensis
were significantly effective in providing a high level of bruchid control at P~0.05.
O. gratissimum was more potent than dried powdered peel of C. sinensis in
reducing or inhibiting oviposition and adult emergence at P,-0.05. None of the
powders used affected the texture, colour and the palatability of the cowpea.