Compatibility studies of Trichoderma harzianum isolate with fungicides used against soil borne disease in coorg mandarin-pepper-coffee plantations

An in vitro bioassay was undertaken to record the compatibility of local isolate of Trichoderma harzianum with fungicides used in coorg mandarin-pepper-coffee plantations. Eight non-systemic, 10 systemic and 9 combi products fungicides were evaluated against Trichoderma for radial growth inhibition on PDA medium using poisoned food technique. Contact fungicides at selected concentration were found to be safer than systemic and combi products except Chlorothalonil.