How to Manage Pests

Pests in Gardens and Landscapes

Anthracnose—Collectotrichum gloeosporioides

Anthracnose may blemish the rind tissue of mature Valencia and navel oranges, grapefruit, and occasionally lemon. The disorder affects mainly fruit on stressed trees with old, dead wood. The Anthracnose fungus usually first infects weakened twigs. During wet or foggy weather, Anthracnose spores drip onto fruit, where they infect the rind and leave dull, reddish green streaks.

Solutions

This disorder is generally not severe enough to require preventive actions.

Anthracnose infection
Anthracnose infection


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/DISEASE/citanthracnose.html revised: April 25, 2014. Contact webmaster.