Control of Xanthomonas campestris in Brussels sprouts with hot water and Aureomycin seed treatment

Eight chemicals employed at various temperatures, concentrations, and time periods were screened for the control of Xanthomonas campesrris on inoculated seed of cabbage Brassica oleracea var. capitata. Excellent control was obtained when seed was soaked in 500 ppm Aureomycin (22.5% chlortetracycline hydrochloride) at 50°C for 25 minutes; seed exposed to 16% acetaldehyde was also free of X. campestris. In field tests Brussels sprouts, B. oleracea var. gemmifera, were free from black rot when grown under good cultural conditions and sanitary practices from naturally infected seed that had been treated with aureomycin at 50°C. Aureomycin residues were not detected in Brussels sprouts at harvest.