How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Small Grains

Leaf Blotch of Oats

Pathogen: Pyrenophora avenae

(Reviewed 2/07, updated 2/07)

In this Guideline:

Symptoms
Comments on the disease
Management

SYMPTOMS

This disease appears as reddish tan leaf blotches that are somewhat linear with irregular margins. Heavily infected leaves die. Seedling blight may occur if coleoptiles are infected.

COMMENTS ON THE DISEASE

The fungus survives on infected, undecayed plant debris in soil or less commonly inside the hull of infected seed. The disease is favored by cool and rainy weather.

MANAGEMENT

No specific control is necessary in California. Practices that control other diseases, such as the use of clean seed, crop rotation, and elimination of crop residue, help control leaf blotch as well.

PUBLICATION

UC IPM Pest Management Guidelines: Small Grains
UC ANR Publication 3466
Diseases
R. M. Davis, Plant Pathology, UC Davis
L. F. Jackson, Agronomy, UC Davis

Top of page

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/r730101611.html revised: February 12, 2007. Contact webmaster.