How to Manage Pests

Pests in Gardens and Landscapes

Orange tortrix—Argyrotaenia citrana

Tortrix larvae are greenish to bright yellow or pale straw colored with a golden head and shield on the segment behind the head. Like other leafrollers, they feed inside webbed nests and, when disturbed, wiggle and drop from a silken thread. This is a coastal pest only.

Identification of species

Damage

Caterpillars feed on leaves, often webbing them together; tender leaf growth and buds may also be eaten. Caterpillars may feed on fruit, creating shallow scars that are unsightly and can be invaded by decay organisms. Grapes or other berries may be webbed together and killed.

Solutions

Destroy host weeds (e.g., mustard, filaree, cheeseweed), mummified fruit, and trash at least a month before buds begin to break. Hand-pick webbed leaves and larvae to help control populations. Early harvest in grapes may eliminate some populations. Natural enemies also feed on eggs and larvae.

For more information on leafrollers, see the Leafrollers on Ornamental and Fruit Trees Pest Note.

Orange tortrix adult
Orange tortrix adult

Damage to apricots
Damage to apricots


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/orangetortix.html revised: April 25, 2014. Contact webmaster.