UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

SKIP navigation

 

Avocado

Identifying Sunburn Damage

Click on photos to enlarge

Sunburn damage
Fruit initially develop pale yellowish discoloration on the side exposed to sunburn.

Sunburn damage: circular blotches
Advanced sunburn causes extensive black, brown, or red discoloration. Sunburn damage is often circular and necrotic, resembling other causes of damage such as fruit rot fungi and wildland fire.

Sunburn damage: necrotic blotches and cracked bark
Leaves develop chlorotic then necrotic blotches, initially between the veins. Brown to purplish, roughened bark forms on upper side of small branches (left) that are sunburned.

Cracked bark and canker
Cracked bark and elongate cankers can develop on branches exposed to direct afternoon sunlight. Other abiotic disorders, certain pathogens, and vertebrates also cause branch cankers.

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/C008/m008ypsunburn.html revised: April 25, 2014. Contact webmaster.