CONCLUSION
From the results of presented study it is concluded that,
although all bio control agents applied individually
reduced disease incidence, synthetic treatments including
T. harzianum, T. Asperellum and T. virens were showed
more protective effect for bio control tomato field
exposed to F. solani and F. oxysporum.
It is widely known that environmental parameters such
as abiotic (soil type, soil temperature, soil pH and water
potential) and biotic (plant species and variety, and
microbial activity of the soil) factors as well as other
factors such as method and timing of applications may
have influence on the biological control efficacy of
Trichoderma isolates. Therefore, it is important that
Trichoderma bio control potential in field should be
further evaluated. Although several biocontrol agents
including botanicals have been tried against Fusarium
wilt disease, still this lethal disease could not be
controlled completely. Besides most of the biocontrol
experiments were conducted either under lab condition
or green house conditions and only in few cases, field
experiments were conducted.
In addition, mixture of bioagents of different genera or
mixture of fungal and bacterial bioagents along with or
without fungicides or botanicals have to be tried to
improve the level and extent of disease control under
different environmental and soil conditions.