Morphological, Physiological and Biochemical characteristics of Xanthomonas campestris pv. campestris by black rot of cabbage

Black rot, the most serious disease of crucifers especially Brassica oleracea var. capitata (Cabbage) causes huge yield losses. Black rot is a systemic vascular disease. Typical disease symptoms are V-shaped yellow lesions starting from the leaf margins and blackening of veins. The cabbage leaves were tested for Xanthomonas campestris pv. campestris infection through morphological, physiological and biochemical analysis. The aim of the study was to identify and confirmation of X. campestris pv. campestris in cabbage. The assay of detected X. campestris pv. campestris infections in diseased plants and from bacterial colonies isolated on selective media, and was more sensitive and specific. Among the ten isolates, isolate I6 produced the maximum growth, lesion size and positive growth in different organic and inorganic sources, different biochemical and morphological analysis.