How to Manage Pests

Pests in Gardens and Landscapes

Pear scab—Venturia pirina

Scab first appears as velvety, dark olive to black spots on fruit, leaves, and stems. The fruit spots become scablike with age and the fruit may become misshapen. On leaves, the infections cause leaf puckering and twisting and eventually tear with age.

Life cycle


Early severe infections are of concern, but late-season infections can be tolerated because peeling removes scabs. Rake or remove leaves on the ground during the winter. Fall foliar fertilizer applications of zinc and urea may hasten leaf fall and reduce the number of spores in the spring. Avoid sprinklers, but if you use them, irrigate between sundown and noon of the following day to allow adequate leaf drying before significant infection can occur.

For more information, see the Apple and Pear Scab Pest Note.

Fruit and leaf spots of pear scab
Fruit and leaf spots of pear scab

Older scabs on fruit
Older scabs on fruit

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2017 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   Contact webmaster.