Management of Alternaria blight of cumin caused by Alternaria burnsii by biocontrol agents, Trichoderma and Pseudomonas

Abstract

Studies on the relative efficacy of biocontrol agents under in vitro and in vivo conditions showed that combined treatment of Trichoderma harzianum + Pseudomonas fluorescens was most effective followed by T. viride + P. fluorescens in management of Alternaria blight of cumin. Pseudomonas fluorescens when treated alone was least effective. Trichoderma harzianum + P. fluorescens recorded 40.86 per cent disease intensity with 35.95 per cent disease control and realization of seed yield of 3.63 q/ha which was 100.55 per cent more than that obtained in control.