How to Manage Pests

Pests in Gardens and Landscapes

Navel orangeworm—Amyelois transitella

Navel orangeworm larvae are milky white to pink with a dark reddish brown head. Two crescent-shaped marks are found on the second segment behind the head. Adults have short snoutlike projections from the front of the head. They are grayish brown in color with irregular silver and dark markings on the wings.

Identification of species | Life cycle


Caterpillars enter fruit or nuts and feed directly on the fruit and nutmeats. Fruit and nuts are contaminated with large quantities of excrement and webbing.


Complete harvest rapidly and early, and remove and destroy unharvested nuts from trees in winter. Natural enemies may provide some control.

Navel orangeworm larva
Navel orangeworm larva

Damage to almond
Damage to almond

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.