Necrotic Ring Spot

 
 
 PHOTO: Robert Mugaas, University of Minnesota Extension

PHOTO: Robert Mugaas, University of Minnesota Extension

 

Identifying Necrotic ring spot

Necrotic ring spot is a troublesome lawn disease caused by a parasitic form of plant life called fungi. Fungi live in the soil, thatch and dead leaves all year round and spread their spores by wind, water, and mowing. The result of necrotic ring spot disease is known as "frog-eye"  characterized by blades of grass yellowing and dying from the tip down.