Studies on Management of Dry Root Rot of Mungbean [Vigna radiata (L.) Wilczek] Caused by Macrophomina phaseolina (Tassi) Goid.

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dc.contributor.advisorChawla, Nitin
dc.contributor.authorAnupriya
dc.date.accessioned2024-01-05T13:58:23Z
dc.date.available2024-01-05T13:58:23Z
dc.date.issued2022
dc.description.abstractMungbean (Vigna radiata (L.) Wilczek) commonly known as green gram or “Mung” one of the most popular pulse crop in India. Root rot caused by Macrophomina phaseolina, is a widespread disease of mungbean in India including in the state of Rajasthan. The pathogen is a polyphagous necrotroph in nature that can up to 15 years in the soil. The management of M. phaseolina is required. The incidence of pathogen varies from 17 to 90 per cent incidence in India with 25 to 48 per cent yield losses in mungbean. A roving survey was conducted during the Kharif season of 2020 in major mungbean growing districts (Bikaner, Hanumangarh, Sri Ganganagar, Churu, Nagaur and Jaipur) to know the disease incidence in different areas of Rajasthan. The disease incidence varies from 17.12% to 28.49% with an average disease incidence of 22.67 per cent. The higher disease incidence (28.49%) was recorded the districts in Bikaner while least in Jaipur (17.12%) district. The pathogen was isolated, purified and proved pathogenic of mungbean through soil inoculation technique. Among 52 genotypes/varieties using, two genotypes Pusa 0871 and SML 1839 were found resistant and (RMG 1139) was moderately resistant. Protein contents were low whereas phenolic and proline contents increased in roots due to disease. The chlorophyll contents in leaves of infected plants were low in comparison to leaves of healthy plant. In variability studies of 12 isolates, Mp-PGE isolate, collected from Jhadla village of Phagi tehsil in Jaipur district, was comparative in fast mycelial growth, whereas Mp-LKS isolate from Peepera village from Lunkaransar tehsil of Bikaner showed slower mycelial growth. These isolates were shown significant differences in terms of radial growth, colony colour, colony diameter, colony texture, mycelial dry weight, sclerotia shape and size and sclerotia number.The, garlic clove extract, T. harzianum and in fungicides, trifloxystrobin 25% + tebuconazole 50% WG (50, 100, 200, 500ppm) significantly inhibited mycelia growth of the pathogen under in vitro studies among other treatment. When applied seed treatment were also tested in pot conditions through and these were found effective in controlling disease. In the field study, maximum disease reduction and higher seed yield were recorded with trifloxystrobin 25%+ tebuconazole 50% WG @ 0.10% while the seed treatment with propineb 70% WP @0.20% was found least effective up to 40 DAS. Under pot conditions, seed treatment with T. harzianum @ 10g/kg seed + soil application of mustard cake @ 0.5t/ha was found most effective. In the field study, maximum per cent disease reduction and higher seed yield were recorded with T. harzianum @ 10 g/kg seed + soil application of mustard cake @ 0.5t/ha
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810205826
dc.keywordsStudies on Management of Dry Root
dc.keywordsDry Root Rot of Mungbean
dc.language.isoEnglish
dc.research.problemStudies on Management of Dry Root Rot of Mungbean [Vigna radiata (L.) Wilczek] Caused by Macrophomina phaseolina (Tassi) Goid.
dc.subPlant Pathology
dc.themeStudies on Management of Dry Root Rot of Mungbean [Vigna radiata (L.) Wilczek] Caused by Macrophomina phaseolina (Tassi) Goid.
dc.these.typePh.D
dc.titleStudies on Management of Dry Root Rot of Mungbean [Vigna radiata (L.) Wilczek] Caused by Macrophomina phaseolina (Tassi) Goid.
dc.typeThesis
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