Necrotic Ring Spot (NRS)

Posted by James Compau on 9 February 2012 | 1103 Comments

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Does your lawn have "frog eyes" in it? We hope you don't because it is probably Necrotic Ring Spot (NRS).

A common name for this disease is "frog eye" due to the appearance of the patches.



NRS is a nasty turf disease and it is difficult to eliminate from your lawn. NRS is a patch disease caused by a fungus that infects the roots of Kentucky bluegrass. It is most active during the Spring and Fall when temperatures are cool and soil moisture is high. However, you may not notice any problems. During hot, dry periods of weather, NRS will manifest itself as circular areas of dead turf, often with a patch of green in the center. NRS fungi attack the root zone of the grass plant which reduces the plant’s ability to move water. This explains why the symptoms are most severe in mid season, even though that is not when the disease in most active.

If your lawn has this problem, give us a call. We can help!!!

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