Fairy Ring Disease
Grasses Susceptible to Fairy Ring
- All species of warm and cool season grasses
Symptoms of Fairy Ring
Fairy Ring Disease has outer rings that are either dark green or brown in color. The shape and size of the rings will vary depending on the species. Activity in the turf ceases when the individual rings come in contact with each other. Some causal agents form fruiting bodies, but do not form rings. Other causal agents will form rings, but no fruiting bodies.
Favorable Conditions for Fairy Ring
Fairy Ring typically occurs in the summer, but can also occur during mild winter climates on cool season turf. In the north, the disease is most common from May until October. In the south, it is most common March through November.
Fairy Ring Management
- Reduce thatch with proper mowing and core aeration
- Proper irrigation
- Nitrogen can sometimes mask the discoloration caused by Fairy Ring
Unfortunately, Fairy Ring is very difficult to eliminate once it is established. Fungicides are available, but have been typically erratic with their effectiveness on the disease. It can sometimes be effective to aerate the affected area several times throughout the season and apply wetting agents to increase the permeability in the soil.