Effect of different rates of filter cake against bruchids (Zabrotes subfasciatus (Boheman) and Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae) on common bean and cowpea

Storage of common bean and cowpea is limited due to different species of bruchids. Zabrotes subfasciatus and Callosobruchus maculatus are the most important species of bruchids attacking stored common beans and cowpeas, causing yield losses reaching up to 38-100%. Two experiments, one on the effect of different rates of Filter Cake against Z. subfasciatus on common bean, and the other experiment on the effect of different rates of Filter Cake against C. maculatus on cowpea were conducted at Melkassa in 2015, 2016 and 2017. Half liter capacity transparent plastic bags were used for the experiment. About 0-12 h old ten unsexed Z. subfasciatus adults were introduced to common bean seeds. For cowpea experiment, 0-12 h old 10 C. maculatus were used with similar procedures with that of common bean. The experiment was laid out in a Completely Randomized Design. Different crops and insect related data were collected. The results obtained demonstrated that significant differences (P