How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—European red mite

European red mites overwinter as eggs. Look for overwintering eggs in roughened bark at bases of buds and spurs on smaller branches and twigs or in wounds. They are globular and red with a slender stalk rising from the top center and many grooves extending from top to bottom. During the growing season, eggs are laid on leaves. Overwintering eggs are laid as early as August and, depending upon weather, as late as October and November.

Eggs hatch when trees bloom, and immature mites migrate to leaves and feed on young foliage. Early in the season, European red mites are mostly found on the undersurface of leaves. There are three instars before the adult stage.

Depending on temperature, European red mites can have five to ten generations per year. Low temperatures in spring can keep high populations from developing.

Eggs of the European red mite
Eggs of the European red mite

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