Effect of different bio-agents and plant extracts against the Sclerotinia rot of Mustard

Two methods were used for test the effectiveness of pathogen. The inhibition of mycelial growth of the test pathogen by Trichoderma viride and Trichoderma harzianum was observed visually by clear cut demarcating zones between their respective mycelial growth. Trichoderma viride exhibited the maximum antagonistic activity and inhibition zone of 14.64 mm, followed by Trichoderma harzianum 15.74 mm. Results indicated that all the leaf extracts were significantly superior over the control in inhibiting the growth of the pathogen. However, garlic (Allium sativum) was most effective as it inhibited maximum growth of the fungus i.e. 72.22 per cent over control, followed by makoy (54.11%), neem (48.15%), pudina (44.44%) tulsi (37.04%) and madar (21.67%).