Georgia lawns suffer most from brown patch. Generally, brown patch attacks only the leaves and stems of the grass, but it can cause severe damage if uncontrolled .
The most serious disease in Georgia lawns is brown patch. It's caused by a fungus which attacks almost all species of grasses during the warm, humid early spring or fall weather. Brown patch is especially serious on St. Augustine and centipede grasses.
Brown patch factors
Several factors can make grasses more susceptible to brown patch. Excessive application of nitrogen fertilizer promotes lush growth that is readily attacked. Another condition that leads to severe disease development is watering late in the afternoon . This allows the grass to stay wet for a long time, which makes it easier for the fungus to grow.
You'll recognize brown patch by the development of irregular circular areas from a few inches in diameter to several feet in diameter. These areas begin as brownish orange to yellow discolorations in the lawn. These scalded-looking areas spread rapidly and become large brown areas. Generally, brown patch attacks only the leaves and stems of the grass, but it can cause severe damage if uncontrolled .
To control brown patch, be sure to avoid overwatering and overfertilization. Use chemicals to control the fungus, if necessary. The recommended chemicals are: Benomyl, Terraclor, Daconil 2787 and Chipco 26019.
For more information on brown patches; contact your local County Extension Office.