Studies on integrated management practices against storage rot of ginger (Zingiber officinale Rosc.)

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dc.contributor.advisorDohroo, N.P.
dc.contributor.authorSharma, Sushma
dc.date.accessioned2017-06-03T11:18:55Z
dc.date.available2017-06-03T11:18:55Z
dc.date.issued2014
dc.description.abstractThe present investigation entitled “Studies on integrated management practices against storage rot of ginger (Zingiber officinale Rosc.)” was conducted in the Department of Plant Pathology. Maximum incidence of the disease was recorded under heaps (47.0%) and pits (25.0%) at Rajgarh locality of Sirmaur district followed by Kasauli under heaps (17.0%) and pits (17.0%) in Solan district. Three different types of symptoms and their causal organism causing storage rot of ginger were studied during storage period in pits i.e. soft rot (Pythium ultimum), dry rot (Fusarium oxysporum) and red rot (Verticillium chlamydosporium).Frequency occurrence of F. oxysporum was found maximum (50%) among fungi causing storage rot of ginger in storage pits and heaps. Fifteen different varieties of ginger were evaluated for their relative resistance to storage rot however, none of the varieties showed resistant reaction while study undertaken in vitro conditions all the varieties were moderately resistant to the disease. During mycoflora studies, ginger obtained from Nahan market recorded (27.93%) significantly higher weight loss followed by sample collected from Shimla market (21.10%). Minimum incidence (20.49%) was recorded when rhizomes were stored at 150C temperature. Highest reducing sugar, non reducing sugar and orthodihydroxy phenol content were recorded in healthy rhizomes of different varieties in comparison to their diseased rhizomes. Highest phenolic, polyphenol and peroxidise content was recorded in diseased rhizomes of different variety in comparison to their healthy rhizomes. Genomic DNA amplification of all isolates of Fusarium spp. produced reproducible bands, out of which ISSR-1, 2 and 3 primers showed 90.9 per cent polymorphism and ISSR-4 showed 100 per cent polymorphism. ISSR-2 was identified as most suitable marker for differentiating Fusarium spp. Hot water treatment at 500C resulted in minimum disease severity (20.32%), minimum decay (17.40%) and rot (20.60%) in comparison to control. Among different fungicides tested under in vitro and field conditions Bavistin was found most effective with 84.63 per cent inhibition in average mycelial growth of the storage rot pathogen. Pooled data indicated minimum storage rot incidence (20.30%) and maximum per cent rhizome recovery (83.67%) in rhizomes treated with Bavistin. Among different botanicals, cow urine and neem formulations minimum incidence 20.67 and 24.70 per cent was recorded in cow urine and neemazal as compared to their control. Trichoderma harzianum was found quite effective (65.08%) in inhibiting the storage rot pathogen while Bacillus subtilis was found effective in inhibiting the mycelial growth of the pathogen upto 55.05 per cent. Integration of Bavistin + HWT + T. harzianum resulted in minimum storage rot incidence (7.2%) after 30 days of storage as compared to control.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810017187
dc.language.isoenen_US
dc.publisherYSPUen_US
dc.subPlant Pathology
dc.subjectdiseases, fungi, storage, ginger, biological phenomena, planting, storage structures, pathogens, irrigation, fusarium oxysporumen_US
dc.these.typePh.D
dc.titleStudies on integrated management practices against storage rot of ginger (Zingiber officinale Rosc.)en_US
dc.typeThesisen_US
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