2.2. Isolation and maintenance of fungal native antagonists
from tomato rhizosphere soil
Rhizosphere soil from healthy tomato plants were
collected from different locations. The identified Trichoderma
antagonists viz., T. hamatum, T. harzianum, T. koningi, T.
longiconis and T. viride were isolated by serial dilution technique
using Trichoderma selective medium (TSM) and compared with
the isolate maintained in the laboratory [13].
2.3. In vitro effect of Trichoderma antagonists against FOL
pathogen
Dual culture technique as described earlier was followed.
Nine mm disc of fifteen days old fungal cultures were placed on
PDA medium one cm away from the edge of the plate, separately.
Trichoderma spp. (9 mm disc) was placed at opposite side of the
Petri plate. Three replicated plates for each treatment was
maintained and incubated at 25±3οC. Per cent inhibition over
control was calculated [14] as per the formulae