Radishes

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Foilage and Leave Problems

Holes from insect feeding


Cause

Flea Beetles.

Treatment

No treatment normally required.

Yellow or brown areas accompanied by white mold


Cause

Downy Mildew (Peronospora parasitica), a fungal disease that develops during cool most conditions.

Treatment

Avoid shaded plantings

Root Problems

Purple or black root


Cause

 Black Root (Aphanomyces raphani), a fungal disease which causes the radish skin to turn purple or black in a single area. As the infection progresses, the entire root may be girdled.

Treatment

Avoid warm weather plantings, and storage conditions.