the tap root, which ants. control. subsequently allows entry of Use compost and straw mulches to reduce maggot populations by hiding predators and diseases like Club root (very excluding egg-laying flies. significant) Intercrop with clovers or other legumes to reduce open soil available for egg-laying flies. Use of floating row screen or mesh covers to exclude egg-laying flies. A solution of crushed rhubarb leaves or a vinegar solution sprayed periodically around cole crop plants may deter and manage the cabbage maggot. Club root (Plasmodiophora If soil pH is lower than 7.2, use lime to increase the pH. No chemicals are brassicae) (very significant) recommended. Use resistant varieties if available. Use crop rotation to non-cole crops for several years. Control brassicaceous weeds near field. Manage drainage so soil does not water-log. Black leg (Phoma lingam) Clean, certified or hot-water treated seed. No chemicals are (very significant) recommended. Good soil drainage. Rotation with non-brassica type crops. Control of brassica-type weeds. Deep incorporation of cole crop residues. Planting resistant varieties. Downy mildew (Peronospora Promoting good drainage. Use of mineral parasitica) (very significant) copper for organic Increasing spacing for better aeration. production. Controlling brassica-type weeds. Use synthetic Using resistant varieties. pesticide Rotating with non-cole crops. containing Sanitation: After harvest, deep plow or destroy plant debris. chlorothalonil Avoid the use of overhead irrigation. (SINOCOLOR 50 SC), or (FOSTONIC 80 WP). Alternaria leaf spot (Alternaria Using clean, certified seed, Use synthetic
the tap root, which subsequently allows entry of diseases like Club root (very significant) ants. Use compost and straw mulches to reduce maggot populations by hiding predators and excluding egg-laying flies. Intercrop with clovers or other legumes to reduce open soil available for egg-laying flies. Use of floating row screen or mesh covers to exclude egg-laying flies. A solution of crushed rhubarb leaves or a vinegar solution sprayed periodically around cole crop plants may deter and manage the cabbage maggot. control. Club root (Plasmodiophora brassicae) (very significant) If soil pH is lower than 7.2, use lime to increase the pH. Use resistant varieties if available. Use crop rotation to non-cole crops for several years. Control brassicaceous weeds near field. Manage drainage so soil does not water-log. No chemicals are recommended. Black leg (Phoma lingam) (very significant) Clean, certified or hot-water treated seed. Good soil drainage. Rotation with non-brassica type crops. Control of brassica-type weeds. Deep incorporation of cole crop residues. Planting resistant varieties. No chemicals are recommended. Downy mildew (Peronospora parasitica) (very significant) Promoting good drainage. Increasing spacing for better aeration. Controlling brassica-type weeds. Using resistant varieties. Rotating with non-cole crops. Sanitation: After harvest, deep plow or destroy plant debris. Avoid the use of overhead irrigation. Use of mineral copper for organic production. Use synthetic pesticide containing chlorothalonil (SINOCOLOR 50 SC), or (FOSTONIC 80 WP). Alternaria leaf spot (Alternaria Using clean, certified seed, Use synthetic
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