Hot acidified zinc sulfate as seed soaking agent for the control of crucifer black rot.
Soaking seed infested with Xanthomonas campestris pv. campestris in 0.1 smallcap˜M acidified zinc sulfate (pH 2.8) for 20 min at 38-40°C was the best treatment tested for eradicating the pathogen from crucifers and was as good or better than hot acidified copper acetate, Atakin, calcium hypochlorite or hot water treatments. The incidence of black rot incited by naturally or artificially infested seeds during the seedling stage was also significantly reduced by this treatment. Acidified copper sulfate or manganese sulfate had an adverse effect on the germination of many crucifers. Treated seed should be rinsed with tap water for 2 min and air dried.