Effect of Ethanolic Extract of some Natural Plants Against Sorghum Aphid

Abstract

The study was conducted at Laboratory of Entomology-Plant Protection Department- Collage of Agricultural Studies to test the effect of ethanolic extracts of the plants cafour, damas and moringa against sorghum aphid ( Rhopalosiphum maidis ) in February 2016. The extracts were used at concentrations (10%, 20% and 30%) to test its effect on insect mortality after 24hours and 48hours of treatment. The results showed that, the treated plants with cafure at 20% and 30% concentration gave the highest mortality, followed by damas. Lower percentages of mortality were obtained by all concentrations of moringa which were significantly not different from the control. The results shows that priority was using cafure in the 30% concentration as insect repellant in sorghum comparing to other tested plants while the moringa was similar to the control results.