Vol. 11, Issue 12 (2022)

Author(s):
RS Gaonkar, RR Rathod, MS Joshi, MM Patil, NV Chaure and VP Kharbadkar

Abstract:
In the present study, one bacterial and three fungal bio-agents viz., Pseudomonas fluorescens (Pf5), Trichoderma harzianum, T. longibrachiatum and T. koningii and seven fungicides viz., Bordeaux mixture 20% WP, Propiconazole 25% EC, Metalaxyl 35% WS, Metalaxyl (4%) + Mancozeb (64%), Copper oxychloride 50% WP, Fosetyl-Al 80% WP and Chlorothalonil 75% WP were evaluated in vitro to study their efficacy against Pythium aphanidermatum. From all the bio-agents evaluated in vitro, P. fluorescens (Pf5) showed an effective inhibition of the pathogen after 7 days of inoculation with highest mycelial growth inhibition of 76.11%. The least mycelial growth inhibition was observed in case of T. koningii with 69.44 percent inhibition over control. Among all the fungicides evaluated in vitro Metalaxyl 35% WS (0.3%) exhibited highest percent growth inhibition (79.7%) whereas, fungicide Chlorothalonil 75%WP (0.1%) recorded significantly least mycelial inhibition (33%) against the test pathogen.