Toxicity of Root Powder of Derris elliptica for the Control of Kola Weevil, Balanogastris kolae in the Stored Kolanut

C.E. Akunne, E.M. Okeke, B.U. Ononye


The root powder of Derris elliptica was used against Balanogastris kolae on kola nut. The root powder of Derris elliptica was applied at various concentrations of 5g, 10g and 15g. The mortality of adult B. kolae at 24, 48, 72, 96 and 120hrs after treatment were recorded and compared with the control. All concentrations recorded higher mortality than the control. The root powder application at the 10g and 15g of the concentrations gave the highest mortality of Balanogastris kolae during the exposure period. However, no significant difference exists between the mortality counts of Balanogastris kolae in various concentrations of the powder and the control.

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