Effects of Hemizygia welwitschii leaf extract fractions on postharvest infestation of maize by Sitophilus zeamais Motsculsky (Coleoptera: Curculionidae)
As part of on-going efforts to use eco-friendly alternatives to chemical pesticides, leaf powder of Hemizygia welwitschii was sequentially extracted in hexane, acetone and methanol.Bioassays were carried out to establish the most active fraction(s) against knowall.blog Sitophilus zeamais in maize.Maize grains (50 g) were treated with concentrations