Heavy rainfall has plagued Louisiana for the past several days, but it could bring a magical sight to grassy fields and lawns.
“Fairy rings” are a turfgrass disease created by several fungal species. The disease is spread through the soil, which allows certain species to spread easier after periods of heavy rainfall, according to the LSU AgCenter.
As appealing as the name is, the fungus can cause harm to grass and an inconsistent appearance. The most common species include Calvaria (coral mushrooms), Chlorophyllum (parasol mushrooms), Lycoperdon (puffballs), Marasmius (gilled mushrooms).
The circles of mushrooms will pop up in different patterns and colors that can help identify the type and how to treat them.
Type I appears as patches of discolored or dead grass in a circular pattern. It can damage grass and should be treated through intense irrigation.
Type II is the opposite. It stimulates grass growth from a central point, sometimes appearing darker than surrounding grass. Balancing the levels of nitrogen in soil and fertilizer can help avoid this type.
Mushroom rings appear on neutral grounds and grassy areas.
Staff photo by Chris Granger NOLA.com | The Times-Picayune
Most visually distinct is Type III, distinguished by the mushroom rings that the fungal phenomena is named for. This type is most common after heavy rainfall. While not particularly harmful to grass, it is toxic to humans and pets. Type III rings can be controlled by picking off the mushrooms before they fully bloom. Then, rake or mow over the area.
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