EVALUATION OF FUNGICIDES, PHYTO-EXTRACTS AND BIO-AGENTS AGAINST CERCOSPORA CANESCENS UNDER IN VITRO CONDITIONS

Effect of seven contact, systemic and combination fungicides were evaluated along with control at different concentrations viz., 100, 250 and 500 ppm through poisoned food techniques against Cercospora canescens. Among the fungicides pyraclostrobin 13.3% + epoxyconazole 5% gave complete mycelial growth inhibition (100%) of at 100, 250 and 500 ppm concentrations followed by azoxystrobin 18.2% SC + difenoconazole 11.4% SC then carbendazim 25% WP + mencozeb 50% WP, hexaconazole 4% + zineb 68% WP, carbendazim 50 % WP, kersoximmethyl 44.3 SC. While, tebuconazole 25.9% EC was found less effective with inhibition of mycelial growth over control. Six plant extracts were evaluated at two concentrations (5 and 10%) under in vitro condition for their efficacy against C. canescens through Poisoned Food Technique and result revealed that the Allium sativum at 10 and 5 per cent concentration was found best in inhibiting the mycelial growth of C. canescens (77.96% and 68.55%) and found significantly superior over all the other plant extracts. While, datura leaf extract and Aak leaf extract was found less effective with inhibition of mycelial growth at 5 and 10 per cent concentrations. Efficacy of bio agents under in vitro conditions Trichoderma harzianum inhibited maximum mycelial growth (78.83%) against 789+3211+Cercospora canescens. While, minimum inhibition was recorded in bacterial bioagent Pseudomonas fluorescens