Biological Management of Groundnut Stemrot Pathogen Sclerotium Rolfsii (Sacc.) By Trichodermaviride
Journal Title: International Journal of Biological Research and Development (IJBRD) - Year 2019, Vol 9, Issue 1
Abstract
Native isolates of groundnut stem rot casual organism, SclerotiumrolfsiiSacc. were collected from major groundnut growing areas of Tamil Nadu. Selected isolates were screened, characterized and identified the virulent isolate. Several native fungal antagonists were isolated against SclerotiumrolfsiiSacc. Among the isolates threeTrichodermaviride and one Trichodermaharzianum isolate were found to have antagonistic effects on groundnut stem rot pathogen. Morphology and spore structure of isolated antagonists were studied under Light microscopy, the antagonistic activities of Trichodermaviride were found to be effective in reducing the mycelial growth, sclerotial formation and germination. The scanning electron microscopy revealed significant inhibition of S.rolfsii by complete parasitization of germinating sclerotia and malformation of sclerotia. The Trichodermaviride treated cultures were shown reduced mycelial growth (83.06%) and reduced sclerotial production (86.31%). The colonization behavior studies revealed that the speed of overgrowth on pathogen was high (grade 5.00) in GNTV1, GNTV2 and GNTH1 than other isolate. The higher propagulelysis was observed in all the isolates. The antimicrobial components of Trichodermaviride were also found to be inhibited the growth activities of the pathogen. This study provides a theoretical and practical explanation of an antagonist explored for control of stem rot caused by S. rolfsii.
Authors and Affiliations
K. Yamunarani, M. Muthamizhan
Keywords
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- EP ID EP600615
- DOI 10.24247/ijbrdjun20192
- Views 90
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Biological Management of Groundnut Stemrot Pathogen Sclerotium Rolfsii (Sacc.) By Trichodermaviride
Native isolates of groundnut stem rot casual organism, SclerotiumrolfsiiSacc. were collected from major groundnut growing areas of Tamil Nadu. Selected isolates were screened, characterized and identified the virulent is...