Efficacy of chinese pepper Zanthoxyllum xanthoxyloides (Lam)‎ watern against the cowpea bruchid Callosobruchus maculatus (F)‎ (Coleoptera: Bruchidae)‎

Abstract EN

The efficacy of acetone extract of the Chinese pepper, Zanthoxylum xanthozyloides (Lam) in the bruchids control was investigated under laboratory storage-conditions of 27-30oC, 60-70 % RH.

Different concentrations of Z.

xanthozyloides were applied against the cowpea bruchid, Callosobruchus maculatus (F) (Coleoptera : Bruchidae) at 0.5 %, 1.5 % and 2.5 % (w / v) and 0.0% (control).

Results showed that the extract achieved 100 % adult mortality at 2.5 % concentration within 96 h of treatment.

2.5 % (w / v) Z.

zanthozyloides reduced larvae development and adult emergence significantly after six weeks of treatment in storage, while control, 0.50 and 1.50 % achieved 0.0, 83.11 and 93.25 % reduction during the same period.

Increase in Weevil Perforations Index of 1.03, 5.04, 12.13 and 50.00 were recorded for beans treated with 2.5 %, 1.5 %, 0.5 % (w / v) and control after 6 weeks of storage, respectively.

This study has revealed Z.

zanthoxyloides as a potential bio-insecticide applicable in the control of stored products.