Efficacy of fungicides and Trichoderma viride mutants against Alternaria helianthi causing leaf blight of sunflower

Abstract

In vitro efficacy of fungicides viz., carbendazim 75 WP, propiconazole 25 EC, metalaxyl 35 SD and azoxystrobin 23 SC and bio-agents viz., Trichoderma viride and its mutants (TVM1 and TVM2) and Pseudomonas fluorescens were tested against Alternaria helianthi causing leaf blight of sunflower. Among the fungicides propiconazole @ 0.1% was found most effective followed by carbendazim @ 0.2% and azoxystrobin (0.05%). Among the bio-agents Trichoderma viride Mutant 1 (TVM 1) was proved as best bio-agent against test pathogen followed by Trichoderma viride mutant 2 (TVM 2) and mother culture of Trichoderma viride.