Cabbage, is one of the most important crops of the cole group of vegetables. In India it ranks next to cauliflower in acreage and first in production among cole crops occupying an area of 3,72,000 ha with annual production of 8534,000 tons. It covers about 4.3% area under vegetable crops in India. In West Bengal cabbage covers 78200.00 ha of area and the total production is 2197400.00 MT. Black rot is a major disease of cabbage (Brassica oleracea var. capitata), caused by Xanthomonas campestris pv. campestris (Xcc) . The disease has been observed in all cabbage growing areas of Bolpur, Birbhum, West Bengal. The present study was carried out on the pathology of black rot disease of cabbage. Morphological, cultural, biochemical, and physiological characteristics of the pathogen were studied. The bacterium produced small, yellow, circular, entire, smooth and shining colonies in the culture medium. The optimum temperature for the growth was found 300C and white light supported maximum growth of the bacterium. Nutritional studies revealed that sucrose gave maximum growth followed by maltase, lactose, dextrose and fructose as the carbon source in the nutrient broth. Black rot of cabbage pathogen also infected other crops of crucifereae family such as Cauliflower, Knol khol, Mustard, Radish and Rape seed. These findings regarding the pathogen may help to formulate the more appropriate way and judicious application of different management options against the diease in this zone.
Black rot, Cabbage, Pathology, Xanthomonas campestris pv. campestris
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