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Diseases and Control
Mustard is attacked by several diseases. Among the most serious are downy mildew, white rust, sclerotinia stalk rot (white mold), leaf spots and virus mosaic. It is not recommended to include mustard in crop rotation systems containing crops such as sunflower, rapeseed, dry edible beans, crambe or safflower. These crops have similar disease problems so disease infestations can build to economic levels. Several broadleaf weeds also serve as hosts or reservoirs for these diseases. Among the more prominent are shepherd's purse, pigweed, wild mustard and field pennycress. Mustard grown in a small grain rotation is one of the best preventatives of serious disease problems and provides an excellent biological break for cereal grain leaf diseases.
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