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Variability studies of Xanthomonas axonopodis pv. punicae (Hingorani and singh) vauterin et al. causing bacterial blight disease of pomegranate and it's management

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Title Variability studies of Xanthomonas axonopodis pv. punicae (Hingorani and singh) vauterin et al. causing bacterial blight disease of pomegranate and it's management
 
Creator B. L, Divya
 
Contributor K. T, Pandurange Gowda
 
Subject diseases, fruits, biological phenomena, pomegranates, inorganic acid salts, bacteria, copper, pathogens, biological development, planting
 
Description Bacterial blight is a serious threat to pomegranate in India. Detailed
investigations have been carried out to study the Symptomatology, strainal
variation especially at the molecular level to identify virulent strains and finally
to develop sustainable integrated management strategies for the semi arid
region of Chitradurga district. The bacterium is rod shaped and gram negative.
Modified D-5 medium was found superior in supporting the growth of the
pathogen. Optimum temperature and pH required for the growth of
Xanthomonas axonopodis pv. punicae was 30oC and pH of 7.0 to 7.5
respectively. The amplicon size of around 1.5 kb was noticed in all the nine
isolates from Solapur, Sangli, Osmanabad, Hiriyur, Koppal, Bijapur, Bidar,
Ananthpur and Coimbatore using 16s rDNA primers confirming that, all these
isolates belong to Xap. The genomic and pathogenic variability indicated that
the isolates from Solapur, Sangli, Osmanabad, Koppal, Bijapur and Bidar
belonged to highly virulent group where as Hiriyur, Ananthpur and Coimbatore
isolates belonged to moderately virulent group. Bactrim, norfloxicin and telba
were found effective in inhibiting the growth of X. axonopodis pv. punicae under
In vitro. Among the two nano particles tested, nano silver particles were found
to be effective with the maximum inhibition zone of 23.3 mm at 100 ppm.
Pruning during October and November months recorded least per cent leaf and
fruit infection. The bagging of fruits resulted in least incidence and severity of
disease besides enhancing fruit colour. In the IDM strategy evaluated for
bacterial blight disease management, the lowest incidence and severity of
disease was observed in the treatment wherein bagging of small sized fruits was
followed by K-cycline (0.05%) + Dimethoate (0.2%)) sprays at 15 days interval.
 
Date 2016-05-21T10:35:47Z
2016-05-21T10:35:47Z
2013-09-23
 
Type Thesis
 
Identifier Th-10657
http://krishikosh.egranth.ac.in/handle/1/66193
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru