Brown patch is most severe during extended periods of hot, humid weather. The disease can begin to develop when night temperatures exceed 60°F, but is most severe when low and high temperatures are above 70°F and 90°F, respectively. Brown patch also requires at least 10 to 12 hours of continuous leaf wetness in order to develop.
How to manage it
Fungicides which contain one or more of the following active ingredients will provide good to excellent control depending on severity of the disease:
For more information on Brown Patch and fungicide selection go to: