Dormancy

    Fairy Rings

    Fairy Rings

    Type I fairy rings (Lester E. Dickens, Bugwood.org)

    Fairy Ring

    Type II fairy ring (Claus Ableiter, Wikimedia Commons)

    Fairy Rings

    Type III fairy ring (Clemson University - USDA Coopertive Extension Slide Series, Bugwood.org)

    Hosts, Symptoms & Signs

    • can affect all lawns; do not directly attack grass

    There are three types of fairy rings:

    • type I: soil and thatch become hydrophobic and the grass dies; brown ring of dead grass
    • type II: rings on the lawn that are 2 – 8 inches wide with lush green grass
    • type III: mushrooms and puffballs are produced in the ring
    • white fungal mycelium can be found in thatch and soil for all three types

    Disease Cycle

    • disease cycle is not known

    IPM Recommendations

    • Reduce thatch with proper cultural practices.
    • Mask fairy ring; water deeply and fertilize to stimulate growth of grass around ring.
    • For type II fairy rings, a wetting agent may be needed.
    • Control with fungicide drenches is inconsistent.
    • Soil replacement: remove soil about 20 inches to each side of the ring and up to 30 inches deep and replace with sterile soil. This is a very expensive management option.