Infected lawn area looks thin and tinted orange or brown

Powdery orange dust like spores can be seen on light colored shoes after walking through an infected lawn

Raised orange or yellow spots or bumps on the grass blade

Powdery orange or yellow dust-like spores easily rub off leaf spots and can be seen on a white tissue

Infected grass is powdered white to gray, as if flour had been spilled

Grass blades have fluffy to powdery white spots

Common in grass grown in shady areas

Infected grass looks thin and weak

Irregular small patches of dead grass throughout the infected area

Spots on leaves, stems and rhizomes

Spots vary in size and color and may be reddish-brown, purplish-black, black and may or may not have a light colored center

Many round pin head sized balls (fungal structures) cover the surface of the grass leaf blade

Round fungal structure may be black, white, yellow, purple, orange or many other colors

Colorful round fungal structures disappear in 1-2 weeks

Typically grass in only one small area of the lawn is affected

Commonly seen after periods of rain or high humidity

Randomly scattered tan to gray round dead patches, 2-6 inches wide

Cobweb like fungal growth on infected grass blades during cool wet periods like early morning

Leaf blades have dry, tan sections with a rusty-brown border, early leaf infections may be a dry, tan oval with a rusty brown border

Many small patches may grow together to create larger areas of thin, tan grass

Irregular to round patches of tan grass 2 to 24 inches wide

Grass blades die and turn tan from the tip down and are often mixed with healthy grass blades

In humid weather, clumps of pink cotton candy-like fungal growth can be seen on infected pathces of grass

Hard pink to red thread shaped fungal structures emerge from the tip of infected grass blades

Common in cool, wet weather and N-deficient grass