Streptomyces is a Potential biocontrol agent for the management of Groundnut stem rot Pathogen Sclerotiumrolfsii
Year: 2024
Type: article
Abstract: Native isolates of groundnut stem rot causal organism, SclerotiumrolfsiiSacc.were collected from major groundnut growing areas of Tamil Nadu.Selected isolates were screened, characterized and identi ied the virulent isolates.Several native bacterial and fungal antagonists were isolated against SclerotiumrolfsiiSacc.Two antagonistic actinomycetes isolates were found to have antagonistic effects the groundnut stem rot pathogen.Morphology and spore structure of isolated antagonists were studied under light microscopy, Biochemical test, Thin layer chromatography.and Biolog analysis.It con irmed the group of microorganisms as Streptomyces.The genus and species level of the antagonists were identi ied by Fatty Acids Methyl Esters (FAME) Analysis.The antagonistic activities of S. violaceusniger were found to be effective in reducing the mycelial growth, sclerotial formation, and sclerotial germination.When antagonists were combined together in various combinations with each other in pot experiments the -1 treatment containing, seed treatment of P. luorescens@ 5g kg +S.violaceusniger @ 5 g/kg was found to be effective in reducing the disease by 81.84 per cent over control followed by the seed treatment of S. violaceusniger @10 g/kg (75.06 per cent).This study provides a theoretical and practical explanation of an antagonist explored for control of stem rot caused by S. rolfsii.
Author: K. Yamunarani S. Sangeetha
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
OpenAlex ID: W4394790935