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Studies on seed borne aspects of anthracnose of chilli and its management

KrishiKosh

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Title Studies on seed borne aspects of anthracnose of chilli and its management
 
Creator Vinaya.Hemannavar
 
Contributor M.S.Laxminarayanaroa
 
Subject Plant pathology
 
Description The present investigation on studies on seed borne aspects of anthracnose of chilli and
its management was conducted during 2006-08 which included testing of chilli seed samples
for seed borne mycoflora, evaluation of seed health testing methods, seed to plant
transmission studies, integrated management of anthracnose of chilli and management of seed
mycoflora of chilli in storage.
Seed health testing of chilli seed samples collected from different parts of northern
Karnataka revealed the dominance of Colletotrichum capsici. Seed washing technique
revealed only the presence of saprophytic fungi like Aspergillus sp. and Penicillium sp.
Among he different seed health testing methods, standard blotter method was found to be
good for detecting the seed-borne infection of C. capsici in chilli. Infected chilli seeds
exhibited poor germination and reduced vigour.
The pathogenic ability of seed borne C. capsici was proved in seedling symptom test
and transmission study. Component plating technique revealed that C. capsici is present both
on pericarp and in embryo. Seed dressing fungicide viz., carboxin + thiram (Vitavax Power),
bioagent Pseudomonas fluorescens and botanical Azadirchta indica were found most
effective in eliminating seed-borne infection of C. capsici and other fungal contaminants
In the integrated seed treatment options, seed treatment with carboxin + thiram at 0.2
per cent concentration along with P. fluorescens at 0.6 per cent concentration followed by
hexaconazole foliar spray of 0.1 per cent concentration at 30 days after transplanting recorded
least per cent disease index with maximum yield and maximum benefit cost ratio. In storage,
chilli fruits stored in 700 gauge polyethylene bag and in metallic container recorded least per
cent seed infection.
 
Date 2016-10-27T18:35:19Z
2016-10-27T18:35:19Z
2008
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/82616
 
Format application/pdf
 
Publisher UAS, Dharwad