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Fairy Ring in Lawns: Mycelium Mats Block Water and Require Aeration Plus Fungicide

Half-moon brown grass for 3 years. Soil white throughout. Is it fungus? 2 lawn experts couldn't answer. No overwatering. Had mushrooms; poured Listerine, gone. Is soil lacking something?

Diagnosis: Fairy Ring

White layer = mycelium (fungal roots), thick enough to repel water.

Treatment

Hard to cure. Repeated aeration + Heritage fungicide = best bet.

Expert wrote newsletter on lawn diseases: link.

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