How to Manage Pests

Pests in Gardens and Landscapes

Botrytis rot (gray mold)—Botrytis cinerea

Leaves on or near the soil or in the dampest areas of the garden turn light brown and develop a gray or brown fuzzy growth of fungal spores. Plants shrivel and rot and often develop flattened hard black masses, called sclerotia, under rotted parts.

Identification | Life cycle


Plant on well-drained, raised beds, use furrow irrigation whenever possible, and try to keep the surface of vegetable beds as dry as possible. When sprinkling plants, do so in the morning so that foliage will dry quickly during the day. Harvest in advance of rainy or humid, cool conditions whenever possible. Remove diseased plants as soon as they appear and dispose of them. Discard plant residue left in the garden to prevent infection of the next planting.



Wilt caused by Botrytis rot
Wilt caused by Botrytis rot

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2016 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/GARDEN/VEGES/DISEASES/lettucebotrot.html revised: June 24, 2016. Contact webmaster.