Abstract
Two Trichoderma aureoviride and two Trichoderma harzianum isolated from organic composts were considered to be involved in suppressiveness of Fusarium wilt. Microscopic examination indicated that hyphae from both aureoviride isolates grew and coiled around the hyphae of Fusarium oxygporum “in vitro”. Non-volatile compounds released by both T. harzianum isolates growing on cellophane disks over malt agar significantly (P= 0.001) inhibited growth of Fusarium oxygsporum and Verticillium dahliae “in vitro”. The same Trichoderma isolates were tested for their influence on Glomus mossaea. Inoculation with each isolate esparately had no significant effect on spore germination, but there was a highly significant (P= 0.001) increase in the production of vegetation spores on the mycelium from G. mosseas germinated resting spores when Trichoderma spp. was inoculated in the center of the plate.
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