How to Control White Leaf Spots on Cruciferous Vegetables

Top down view of a turnip leaf infected with white leaf spot (Cercospora brassicicola).

White spot fungi are selective in the crucifers they infect and cause disease on the leaves of turnip, rutabaga, canola, mustard, radish, and horseradish. The fungi overwinter on volunteer plants and cruciferous weeds. Read on to learn how to control white spot fungus on crucifers.