Bio-activities of powders four plants against Prostephanus Truncatus Horn. (Coleoptera: Bostrichidae) and Tribolium Castaneum Herbst (Coleoptera: Tenebrionidae)

The effect of the dry powders of the roots and leaves of Ocimum canum, Zanthoxylum xanthoxyloides, Moringa oleifera and Securidaca longipedunculata on the survival of Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) and Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) was determined in the laboratory. Generally, all the plant materials exhibited various levels of bio efficacies, with Z. xanthoxyloides and S. longipedunculata exhibiting the highest potency. Percentage survivorship of 35% and 40% were recorded for the roots and leaves, respectively, of Z. xanthoxyloides against T. casteeneum while 20% and 30% were recorded for roots and leaves of S. longipedunculata, respectively, against P.tuncatus.