The beauty of a lawn can be quickly destroyed by brown patch, a serious fungal disease that predominantly affects St. Augustine and zoysiagrass. Brown patch is a turfgrass disease that is caused by the Rhizoctonia species fungus.
When Does Brown Patch Appear?
Generally, we see and treat brown patch during the fall and the warmer periods of the winter months.
How Can I Detect Brown Patch?
Viewing brown patch from above, it will look like a doughnut – a ring of tan grass having a patch of green grass in the center.
Individual grass blades will be brown down to the crown, where the blade merges from the group, but the crown will be green.
Grass blades will easily pull off of stolons in the grayish area.
These patches can range in size from a few inches to several feet in diameter.
How Do I Prevent Brown Patch?
Prevention is much easier to deal with than treatment after a fungus develops! The common themes of unwanted fungus are humid/damp conditions, over-watered lawns, dry lawns, and poorly maintained lawns.