Fairy ring is a common turfgrass disease in Louisiana caused by several soilborne fungal species in the class Basidiomycetes. In Louisiana and other parts of the world, fairy ring is caused by species of fungi known as Calvaria (coral mushrooms), Chlorophyllum (parasol mushrooms), Lycoperdon (puffballs), Marasmius (gilled mushrooms) and others. Symptoms of fairy ring generally are first noticeable as circular or semicircular bands or rings of stimulated, dark-green grass, necrotic (dying) grass or combinations of both. These symptoms may appear in all turfgrasses grown in Louisiana and can be aesthetically displeasing to homeowners.
Fairy rings are further classified into three types: Type 1 includes those where the grass is killed or badly damaged; Type 2 includes those where the grass growth is only stimulated; and Type 3 includes those where there is no damage to the turf, but the fruiting bodies of the fungus (sporocarps) are found in rings, especially after a heavy rainfall.
Also, three distinct zones in the band or ring can be observed: an inner zone where there is luxuriant grass growth, a middle zone where the grass may be under drought stress or dead and an outer zone where there is some stimulated grass growth.
Type 2 fairy ring
Type 3 fairy ring
One way to reduce disease incidence and accelerate turfgrass recovery is to maintain a healthy lawn through balanced fertilization and irrigation and regular mowing. Follow these simple guidelines:
There is no effective chemical control available for homeowners.
For information on sample collection and submission guidelines, please visit the Plant Diagnostic Center.
Download here: Louisiana Home Lawn Series: Fairy Ring 3624-W