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White leaf spot on mustard caused by Mycosphaerella capsellae (anamorph = Pseudocercosporella capsellae). Leaf lesions may be angular or circular and can vary from pale green to white to tan.
Downy mildew, caused by Hyaloperonospora (Peronospora) parasitica, favors cool, wet weather. This disease occurs on most crucifers.
The LSU AgCenter and the LSU College of Agriculture
