Effects of Piper guineense seed and Zingiber officinale rhizome powder on Callosobruchus maculatus in cowpea. – A. I. Nta, E. A.Uyoh, E. E. Oku and E. A Edu
Seeds of Piper guineense and rhizomes of Zingiber officinale were evaluated for their insecticidal properties against Callosobruchus maculatus in cowpea seeds. The mean number of eggs laid and mean number of bored sites were significantly reduced (P< 0.05) at all concentrations of P. guineense relative to control (untreated cowpea). The effect of Zingiber officinale was not significant (P<0.005) at all concentrations used. Seeds of P. guineense has commendable insecticidal property against Callosobruchus maculatus. The study provides scientific rationale for the use of Piper guineense in post-harvest protection of cowpea seeds.