UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

SKIP navigation

 

How to Manage Pests

UC Pest Management Guidelines


Larva of navel orangeworm.

Fig

Navel Orangeworm

Scientific Name: Amyelois transitella

(Reviewed 7/06, updated 7/06)

In this Guideline:


DESCRIPTION OF THE PEST

The adult navel orangeworm moth is about 0.6 inch long and has short snoutlike projections from the front of the head. It is grayish brown in color with irregular silver and dark markings on the wings. Larvae are caterpillars that vary in color from white to a deep pink and are up to 0.8 inch in length when mature. A crescent-shaped marking on each side of the second segment behind the head distinguishes this worm from others. Eggs are white when laid, but turn pink within a few days. They are usually laid in fissures on the ripening fruit or under the scales around the eye.

DAMAGE

Damage is caused when the worm feeds in the fruit.

MANAGEMENT

Navel orangeworms have a wide host range, primarily infesting damaged and overripe fruits and nuts. They overwinter in mummified fruits hanging on trees. Complete harvest rapidly and early, and remove and destroy leftover cull fruit. Clean up surrounding hosts such as almonds during the winter as well. Chemicals applied for the control of driedfruit beetles may partially control navel orangeworm populations. No chemical control guidelines have been developed for navel orangeworm in figs.

An introduced parasite, Goniozus legneri, has been released with limited success into some almond orchards for control of navel orangeworm. No data has been developed for the efficacy of the wasp in fig orchards.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Fig
UC ANR Publication 3447
Insects and Mites
R. L. Coviello, UC UC Cooperative Extension, Fresno County
W. J. Bentley, UC IPM Program, Kearney Agricultural Center, Parlier

Top of page


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/r261300911.html revised: January 8, 2014. Contact webmaster.