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How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Dry Beans

Ozone Injury

(Reviewed 8/07, updated 8/07)

In this Guideline:

SYMPTOMS

Ozone symptoms vary depending on the type of pollutant and concentration, the cultivar, and environmental conditions. The most common symptoms of ozone damage on field-grown beans is bronzing, in which a purple-brown discoloration develops on the upper surface of the leaves.

COMMENTS

Ozone injury is caused by high levels of ozone (O3) in the air. Ozone is generated by the interaction of atmospheric components and the products of combustion engines. The problem is favored under conditions of high temperature and light intensity.

MANAGEMENT

Some tolerant cultivars are available.

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Dry Beans
UC ANR Publication 3446
Abiotic Disorders
R. M. Davis, Plant Pathology, UC Davis
Acknowledgment for contributions to Abiotic Disorders:
A. E. Hall, Botany and Plant Sciences, UC Riverside
Acknowledgment for contributions to virus sections in Diseases:
R. L. Gilbertson, Plant Pathology, UC Davis
Acknowledgment for co-authorship of Ascochyta Blight:
C. A. Frate, UC Cooperative Extension, Tulare Co.

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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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 How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/r52800411.html revised: August 8, 2007. Contact webmaster.