Effect of Exudates of Trichoderma harzianum and Trichoderma viride on the Mortality Percentage of Nymphs and Adults of Schizaphis graminum Rondani (Aphididae: Homoptera)

Abstract

The results should that 100% concentration of Trichoderma harzianum exudates had a highermortality effect on nymphs and adults of aphid it reached 57.26% , 44.79% respectively . the mortality ratewas higher in third day 48.37% compared with first day 32.06% . in pots the mortality rate 53.38% , 51.62%respectively . the exudates of Trichoderma viride in vitro had mortality rate 55.95% ,45.64% on nymphs andadults of aphid respectively in 100% concentration . the mortality rate after three days was 46.76% comparedwith first day 31.89% . at pots the mortality rate reach 44.86 ,43.59% respectively .