|Left side of #9 Fairway|
They are caused by fungi that inhabit the soil and feed on the dead organic matter that is present. Nitrogen is released during the process which causes the surge of growth in the edge area.
|The mycelium is the white stuff (#15 fairway)|
The fungi usually create a mat of mycelium that is underneath the thatch, it can be seen if you scratch the surface. The layer of mycelium can be pretty impermeable and can make it difficult to water those areas.
Also, during certain times of the year mushrooms will emerge from the rings. Those are the fruiting bodies of the fungi and will release their spores to the wind and propagate.
The appearance of the fairy rings and the locations in the playing areas of the golf course have made it necessary to treat. We started applying fungicides to the areas last week and will most likely have to retreat the areas at least one more time. Be assured that the golf course maintenance department is on top of the situation.
Thank you for your time.