Vol. 11, Issue 8 (2022)

Author(s):
Lavanya N and Kelaiya DS

Abstract:
Castor (Ricinus communis L.) is one of the most important non-edible oilseed crop in the world and it is affected by number of diseases, of which the root rot is the one serious disease caused by Macrophomina phaseolina. Experiment was conducted in Kharif 2021 at Department of Plant Pathology, College of Agriculture, JAU, Junagadh. In this study, six fungal bio control agents and bacterial bio control agents, respectively were evaluated for their antagonistic ability to suppress the growth of Macrophomina phaseolina in laboratory condition. Among the tested fungal antagonists, Trichoderma asperellum showed maximum mycelial growth inhibition (89.11 per cent) of the pathogen, followed by Trichoderma harzianum (87.22 per cent) and among bacterial bio control agents, Bacillus subtilis-isolate 1 showed maximum mycelial growth (86.66 per cent) of the pathogen, followed by Pseudomonas fluorescens-isolate 1 (84.44 per cent) under in vitro.