Necrotic Rings - Knowledgebase Question

Highlands Ranch, Co
Question by rlorance
March 26, 2010
I am told that I have Necrotic (sp?) Rings in my lawn -- for the past three years, I get the rings in the fall and after replanting the area in the spring, I get good lawn for the summer, just to get the rings again. Last year, I applied F-Stop three times in the early summer -- the rings have returned. Any new ideas?

Answer from NGA
March 26, 2010


Rather than guess at the disease, I'd like to refer you to the following website from Colorado State University. It has photos of Necrotic Ring Spot and describes the causes and control strategies available in your state. I hope you find it helpful. Here's the address:

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