Antagonistic action of Trichoderma harzianum and Trichoderma viride against Fusarium solani causing root rot of tomato
Perveen, Najat A. Bokhari and Kahkashan . 2012
Trichoderma spp. are fungi that are present in substantial numbers in nearly all agricultural soils. They received attention mainly due to their importance in biological control of soil born plant pathogens. They are used in reasonably large quantities in plant agriculture both for disease control and increased yield. The antagonistic potential of Trichoderma harzianum and Trichoderma viride were evaluated in the present study against Fusarium solani casual agent of root rot of tomato. In vitro test showed that T. harzianum exhibited higher antagonist activity than T. viride against F. solani. Dual culture and volatile metabolites assays showed that T. harzianum was more effective in suppressing the growth (51.4 and 38.1%) of pathogen. Culture filtrates of T. harzianum and T. viride caused reduction in the growth of F. solani by 21.3 and 17.3%, respectively. Under pot conditions, tomato plants treated with T. harzianum showed 117.5 and 138.9% increase in plant height and dry weight, respectively compared to the control. T. harzianum caused 55.5% reduction in disease incidence while T. viride reduced root rot by 41.1%. The results obtained here clearly indicate that T. harzianum is more effective antagonist against F. solani as compared to T. viride.
Abstract
Abstract
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