Brown patch/Rhizoctonia threat

Brown patch (caused by the fungus Rhizoctonia) usually behaves as a summertime disease that strikes when humidity is high and when average air temperatures reach 60 - 70F. However, in locations with warm and dry climates (such as the southwestern U.S.), it is moisture—and not air temperature—that is the main limiting factor in brown patch attack. This means that brown patch can be a problem during the cool and wet weather, even when average air temperatures are as low as…