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Studies on factors affecting disease development and management of fruit rot of chilli caused by Colletotrichum capsici (Sydow) Butler and Bisby

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Title Studies on factors affecting disease development and management of fruit rot of chilli caused by Colletotrichum capsici (Sydow) Butler and Bisby
 
Creator Geat, Neelam
 
Contributor Khirbat, S.K.
 
Subject fungi, Diseases, Planting, Fruits, Chillies, Colletotrichum capsici, acidity, Application methods, Organic acids, Biological phenomena
 
Description Studies on factors affecting disease development and disease management through nonconventional chemicals and plant extracts were carried out with Colletotrichum capsici causing fruit rot
of chilli. The optimum temperature for maximum disease severity on red fruits of chilli was 28°C. In
host range studies the pathogen was found to infect two kharif crops (bajra and jowar) and two weeds
(ammania and cassia). In vitro studies on the sensitivity of Colletotrichum capsici to different nonconventional chemicals, the pathogen was most sensitive to salicylic acid. In plant extract studies, the
khejri (50%) was most effective in reducing mycelial growth (79.39%) as well as 92.28 per cent spore
germination inhibition of Colletotrichum capsici under in vitro conditions. In studies with nonconventional chemicals under screen house conditions, salicyclic acid at the concentration of 5mM
induced resistance in plants and gave 67.86 and 78.63 per cent disease control in susceptible and
resistant variety respectively over check. Biochemical studies indicated that there was pronounced
increase in total phenol, tannin and electrolytic leakage in resistant variety (Sadabahar) when sprayed
with salicylic acid at 5mM concentration after 48 hours of pathogen inoculation. However, flavonol
content does not play any significant role in resistance.
 
Date 2016-09-16T12:12:30Z
2016-09-16T12:12:30Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/77017
 
Language en
 
Format application/pdf
 
Publisher CCSHAU