Potentials of Two Indigenous Plants Powder for the Control of Stored Maize Weevil, Sitophilus zeamais (Motschulsky)

Potentials of two indigenous plants powder derived from Acmella oleracea , Linn and Lantana camara , Linn were evaluated in the laboratory at ambient temperature and relative humidity (28±20C; 75±5% RH) for the control of stored maize weevil, Sitophilus zeamais (Motsch). Powders obtained from air-dried flower heads of A. oleracea and leaves of L. camara were tested at 1, 3 and 5% (w/w) concentrations. Parameters assessed were effect of plant powders on weevil mortality (toxicity test), adult emergence (oviposition deterrence test) and germination (viability test) of seeds after storage. Results showed that the 3% and 5% plant powders significantly (p<0.05) increased weevils cumulative mortality and suppressed adult emergence compared to 1% powders and controls. The result also revealed that the efficacy of these plant powders on the weevils was dosedependent with higher doses providing greater protection of the maize grains. Seeds viability test