viride (isolate-08) were purified through subcultures from single spores and identified to species level based on sequences of the Internal transcribed spacer regions 1 and 2 (ITS1 and ITS2) of the ribosomal DNA (Maymon et al., 2004; Hermosa et al., 2000). In previous in vitro and greenhouse tests, we tested eight Saudi isolates of Trichoderma against M. javanica. Based on the results of these tests (un-published data), two promising isolates namely: T