Crucifer Black Rot- Bacterial blight – Xanthomonas campestris pv. campestris (Xcc) Black stem – Black vein – Stem rot – Stump rot –

Crucifer black rot Common name Crucifer black rot Bacterial blight Black stem Black vein Stem rot Stump rot Causal agent It is a bacterial disease that infects crucifers, especially kale, cabbage, and cauliflower. Scientific name Xanthomonas campestris pv. campestris (Xcc) Symptoms & Signs Crucifer black rot is characterized by irregular, yellow spots on the leaves. Young seedlings are more prone to show symptoms. The spots expand into a V-shape with necrosis of tissue in the center. The necrotic tissue also has a yellow halo around its edges. Veins also turn brown or black, and the plant shows signs of wilting. Transmission The bacteria travel to other plants by means of wind, water, insects, infected tools, or contact. It then enters the plant through wounds or natural openings such as stomates. The bacteria thrive in warm, humid, and moist conditions, between a temperature of 79 F to 95 F. Time of concern Early spring to late summer Common hosts Cabbage Kale Cauliflower Broccoli Brussel sprouts Turnip