donut shape spots - Knowledgebase Question

Name: jerry codrey
new braunfels, Te
Question by jerry21
October 9, 2009
What is the donut shaped spots in my yard they are brown with a center of green grass how can i treat this

Answer from NGA
October 9, 2009


What you describe can indicate dog urine spots, grub feeding, or a fungal disease called ring spot. Necrotic Ring Spot is caused by Leptosphaeria korrae, a fungus which is most active in spring and fall, although symptoms may be observed throughout the season. Initial symptoms are patches 6-24 inches in diameter with a mixture of normal, straw- and red-colored blades around the outer portion of the ring, resulting in a "frog-eye" pattern. The roots and crowns of affected plants are covered with black strands of the Necrotic Ring Spot fungus. Control requires a combination of management practices including: thatch control, adjustment of fertilizer practices, relieving soil compaction, changing watering practices, and possible use of a fungicide.

Hope this information helps you determine just what the problem might be.

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