Problems With Centipede Grass

Fairy Rings

• Fairy rings are a fungal disease and a frequent problem with centipede grass. The disease is characterized by the appearance of large circles of dead grass that keep getting larger in diameter over time, often getting as large as 3 to 20 feet. Mushrooms of the disease-causing fungi start to sprout on the borders of the rings. These mushrooms are not present in all cases and can suddenly appear during common mushroom growth season. No effective treatments are available for fairy rings. The North Carolina State University Extension site recommends tilling the soil in the affected areas and replacing the dead grass with healthy grass.

Ground Pearls

• Ground pearls are small scale insects that damage the roots of centipede grass. The damage caused by ground pearls appears in the form of circles of dead grass, which look like fairy rings. The circles of dead grass get larger over time. There is no grass growth within the circle but only weeds. The disease is named for the small pearl-like, pink adult organisms on the grass roots and in the soil. No known control exists for ground pearls. Centipede grass is more prone to becoming infected with ground pearls than Bahia grass or Bermuda grass.

Nematodes

• Nematodes, such as the sting and the ring nematodes, can cause extensive damage in centipede grass. The sting nematodes lead to thinning and death of centipede grass, especially if they strike in dry and hot weather. The ring nematode is also a frequent invader in centipede grass. No nematicides are available for the control of the sting or ring nematodes in home gardens, making healthy management practice the best line of defense in residential lawns. Another good option is to use grass variety, which is less prone to become infected such, as the more resistant Bahia grass and Bermuda grass. Amending soil amply with organic matter often helps to reduce chances of nematode infection.