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

Damage

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.

Solutions

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
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Agriculture and Natural Resources, University of California

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