Control ofXanthomonas campestrispv.campestrisin Crucifer Seed with Slurry Treatments of Calcium Hypochlorite

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Abstract
Sixteen treatments were tested as soaks or slurries to eradicate the cabbage black rot pathogen (Xanthomonas campestris pv. campestris) from Brassica oleracea seed. The pathogen was reduced to undetectable levels in one laboratory-infested lot and in eight of 15 naturally infected lots when seed were slurry-treated with calcium hypochlorite at 10-20 g a.i./kg of seed and left sealed in containers for 16 hr. Slurry treatments did not imediately reduce germination but did reduce germination of some lots 6 mo after treatment. Slurry treatment is more compatible than soaks with commercial seed-conditioning practices and has less potential for injury to seed or spread of nontarget pathogens.