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Citrus

Botrytis Rot

Pathogen: Botrytis cinerea

(Reviewed 7/03, updated 7/03)

In this Guideline:

Symptoms
Management

SYMPTOMS
Botrytis rot is mainly a problem on lemon fruit, but the fungus may also infect twigs and small branches of lemon trees. The fungus infects through injuries and forms gray, velvety mats of fruiting bodies on infected tissue, causing the surface of fruit to be bumpy. Infected twigs may die back several inches.

MANAGEMENT
General preventive measures, such as avoiding mechanical injury, protecting against frost and brown rot, and pruning regularly, help reduce the incidence of Botrytis rot.

PUBLICATION

UC IPM Pest Management Guidelines: Citrus
UC ANR Publication 3441
Diseases
H. D. Ohr, Plant Pathology, UC Riverside
J. A. Menge, Plant Pathology, UC Riverside

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