In vitro evaluation of bio control agents against Pyricularia grisea (Sacc.) causing rice Blast

Abstract

Five different biocontrol agents viz., Trichoderma viride, Trichoderma harzianum, Trichoderma harzianum (TNAU), Trichoderma koningii and Pseudomonas fluorescens evaluated against Pyricularia grisea in vitro. Among the five different biocontrol agents, maximum growth inhibition observed with P. fluorescens (63.7%) followed by Trichoderma koningii (52.2%), Trichoderma viride (47.1%), Trichoderma harzianum (TNAU) (42.4%). The lowest growth inhibition was observed with Trichoderma harzianum (29.23%). Among the Trichoderma isolates, Trichoderma koningii (52.2%) and Trichoderma viride (47.1%) were found better with significant difference in mycelial growth inhibition of Pyricularia grisea.