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

KrishiKosh

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Title Studies on integrated management practices against storage rot of ginger (Zingiber officinale Rosc.)
 
Creator Sharma, Sushma
 
Contributor Dohroo, N.P.
 
Subject diseases, fungi, storage, ginger, biological phenomena, planting, storage structures, pathogens, irrigation, fusarium oxysporum
 
Description The 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.
 
Date 2016-04-20T11:07:49Z
2016-04-20T11:07:49Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65498
 
Language en
 
Format application/pdf
 
Publisher YSPU