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Cole Crops

White Spot

Pathogen: Pseudocercosporella capsellae

(Reviewed 6/07, updated 6/07)

In this Guideline:

Symptoms
Comments on the disease
Management

SYMPTOMS

This fungus causes circular, light tan leafspots that are up to 0.5 inch in diameter. Sometimes dark streaks and splotches develop in the spots. If conditions are favorable, the characteristic white growth of spores may be observed on the leafspots.

COMMENTS ON THE DISEASE

White spot is a relatively minor and infrequent disease on cole crops. Occurrence is often related to heavy winter rains. The pathogen does not persist in soil, but survives on weed hosts and volunteer crucifers. This pathogen also infects leafy crucifers such as red mustard and tat tsoi grown in coastal areas.

MANAGEMENT

No control measures are recommended.

PUBLICATION

UC IPM Pest Management Guidelines: Cole Crops
UC ANR Publication 3442
Diseases
S. T. Koike, UC Cooperative Extension, Monterey County
K. V. Subbarao, Plant Pathology,UC Davis, Salinas

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