Insecticidal Effect of Piper guineense Seed Powder in the Control of Beans Weevil Callosobruschus maculatus (Fabr)

Piper guineense commonly called usira in edo, uziza in igbo and ighereliyere in yoruba belongs to the family piperaceae. the efficiency of its seed powder in the control of callosobruschus maculatus (beans weevil) was investigated in the science laboratory department of federal polytechnic, auchi, edo state nigeria. the seed powder was applied at the rate of o control, 15, 25, 50 and 100 (gkg^-1). the result obtained shows that piper guineense seed powder at 25gkg^-1 to 100gkg^-1 were effective in the control of callosobrusus maculatus at 0.01% level of significance. it was revealed that a very strong insecticidal action of i. piper guineense on beans weevil. however, the efficiency of this insecticidal action on callosobruschus maculatus with increasing concentration of the plant material seed powder with 100gkg^-1 giving the highest mortality rate, residual action and egg plugs of the weevils. this finding is critical to resource poor farmers in developing countries who will find this trial practicable and affordable.