How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Pear psylla

Pear psylla adults overwinter in sheltered places in the bark or under the ground. Eggs are tiny, elongated, and yellow and are barely visible without a hand lens. They are laid on or near fruit spurs starting in late January or early February. As buds open, females lay eggs along midribs and petioles of developing leaves or in stems and leaves of blossoms. Nymphs pass through five instars, four of which are almost completely encased in honeydew. When first hatched, the tiny nymphs are yellow with red eyes and black antennae. The third stage is yellowish green and the fourth greenish brown. The fifth instar, called the hardshell stage, is dark with prominent wing pads.

Psylla adult
Psylla adult
Eggs on fruit spurs
Eggs on fruit spurs
Hardshell stage
Hardshell stage
Young nymph
Young nymph

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/LIFECYCLE/lcpearpsylla.html revised: April 25, 2014. Contact webmaster.