How to Manage Pests

Pests in Gardens and Landscapes

Pear rust mite—Epitrimerus pyri

Adult pear rust mites are tiny whitish brown, wedge-shaped mites.

Identification of species | Life cycle


Pear rust mites feed on the surface of fruit and foliage, causing a bronzing of the tissue. Injury to leaves may stunt the growth of young trees. After petal fall, populations may develop on fruit around the calyx or stem end, giving a localized russetting to those areas; russetting may spread over the entire fruit surface.


In backyard situations, natural enemies usually keep pear rust mites under fairly good control. Damage does not generally justify treatment in backyard trees. If treatment is necessary, best control is achieved with a fall application of sulfur and oil in November.

Adult pear rust mites
Adult pear rust mites
Darkening of leaves
Darkening of leaves
Darkening of leaves
Russetting on fruit

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2014 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/FRUIT/PESTS/pearrustmite.html revised: April 25, 2014. Contact webmaster.