How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Scab

Scab fungi overwinter primarily in infected leaves on the ground, but also on lesions on twigs in some hosts. Rain or irrigation during spring splashes spores from leaf litter onto developing foliage or fruit, which become infected. Mild temperatures and high humidity promote disease development, which is arrested by hot, dry weather.

Scab life cycle

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

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