How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—White mold

Sclerotia survive in the soil. When they are within the top 2 to 3 cm of soil they can germinate to form a saucer-shaped fruiting body called an apothecium. Each apothecium produces millions of spores, which are disseminated by wind. Both infection and subsequent spread of white mold are determined by temperature and moisture. White mold is favored by cool, moist conditions. Spores germinate on and colonize dead or senescent tissue; senescent flowers are frequently the source of new infections.

Sclerotia and mycelium on bean plant
Sclerotia and mycelium on bean plant

Fruiting structuresFruiting structures


Statewide IPM Program, Agriculture and Natural Resources, University of California
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