STUDIES ON CITRUS CANKER CAUSED BY Xanthomonas citri subsp citri IN KAGZI LIME (Citrus aurantifolia Swingle)
| dc.contributor.advisor | K. C, Kiran kumar | |
| dc.contributor.advisor | Patil, H. B. | |
| dc.contributor.advisor | Narabenchi, Gangadhar | |
| dc.contributor.advisor | Mushrif, Sadanand K. | |
| dc.contributor.advisor | A.G., Babu | |
| dc.contributor.author | K., CHETHANKUMAR | |
| dc.date.accessioned | 2018-02-19T10:19:06Z | |
| dc.date.available | 2018-02-19T10:19:06Z | |
| dc.date.issued | 2016-09 | |
| dc.description.abstract | The present investigation on “Studies on citrus canker caused by Xanthomonas citri subsp citri on Kagzi Lime (Citrus aurantifolia Swingle)” was conducted at the Department of Plant Pathology, College of Horticulture, Bagalkot during 2015-2016. The causal organism X. citri subsp citri was isolated from infected leaf, branch and fruit showing typical symptoms of bacterial canker. The pathogenic nature of the organism was proved by Koch’s postulates and confirmed through 16srRNA sequencing. Survey conducted in major lime growing districts of Northern Karnataka revealed that the disease severity on leaf was highest in Kalaburagi district with 23.11 per cent and on fruit and branch was observed highest in Raichur district with 15.78 and 16.13 per cent. Biochemical characterization revealed that the isolates collected were Xanthomonas citri subsp citri without any variability. The antibiotic compounds and chemicals each at three different concentrations were evaluated for their efficacy against Xanthomonas citri subsp citri by inhibition zone assay method. Among the different antibiotics, 2-Bromo-2 nitropropane-1, 3-diol showed highest inhibition (14.67, 16.33 and 18.17mm) at 300, 400 and 500ppm. Among the fungicides copper hydroxide recorded highest inhibition (14.33, 15.67 and 17.33 mm) at 1500, 2000 and 2500 ppm respectively. Thirteen bacterial antagonistic bacterial bioagents were evaluated against Xanthomonas citri subsp citri under in-vitro condition and observed maximum inhibition (>90%) from two isolates VK-6B (Lysinibacillus xylanilyticus) and KK-3A. The botanicals like plant extracts and different commercial oils were evaluated for their efficacy against Xanthomonas citri subsp citri. The alcoholic and aqueous extracts of eleven plant extracts and nine different commercial oils were tested. Among them Prosopis juliflora (10.83 and 15.21mm) and Garcinia indica (9.50 and 14.00mm) was found to be the most effective botanicals with maximum average inhibition. The experiment conducted in nursery showed that 2-Bromo-2 nitropropane-1, 3-diol and Garcinia indica treated plants showed positive result in reduction of disease. Similarly in field condition 2-Bromo-2 nitropropane-1, 3-diol @ 0.5gm + COH @ 2.5gm and 2-Bromo-2 nitropropane-1, 3-diol @ 0.5gm + Garcinia indica @ 1:5 combination treatment recorded less disease incidence compared to other treatments. | en_US |
| dc.identifier.other | UHS14PGM478 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810041157 | |
| dc.keywords | PLANT PATHOLOGY | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | University of Horticultural Sciences, Bagalkot | en_US |
| dc.sub | Plant Pathology | en_US |
| dc.subject | null | en_US |
| dc.theme | STUDIES ON CITRUS CANKER CAUSED BY Xanthomonas citri subsp citri IN KAGZI LIME (Citrus aurantifolia Swingle) | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | STUDIES ON CITRUS CANKER CAUSED BY Xanthomonas citri subsp citri IN KAGZI LIME (Citrus aurantifolia Swingle) | en_US |
| dc.type | Thesis | en_US |