Round patches of tan to gray matted down grass, 2 to 8 inches wide

Patches appear pale pink in the sun, and may have a gray border

Many patches may grow together to create large dead areas in the lawn

Disease only occurs in wet conditions at close to freezing temperatures (early spring is most common)

Round gray patches of matted down grass, 1 inch to 3 feet wide

Patches may appear silvery-gray and brittle when dry

In wet conditions cobweb-like fungal growth can be seen on the patches

Tan to dark brown, hard oval to round ball the size of bee-bees occur on infected grass blades

Many patches may grow together to create a large dead area in lawn

Disease only occurs in wet conditions at close to freezing temperatures (early spring is most common)

Patches of tan upright dead grass in round patches, rings or arcs

Patches start out 2 to 4 inches wide, but can grow up to 2 to 3 feet wide

No spots on leaves

If dug up, roots and crowns of grass plants are black, roots may be rotted, short and thin

Symptoms commonly appear during a hot, dry period following cool, wet weather

Dark green rings or arcs in lawn, and inner ring of brown grass may or may not be present

Grass in the ring or arc may be taller than surrounding grass

Mushrooms may be present in rings or arcs during wet weather

Common in lawn areas visited by dogs

Typically circular areas of dead grass less than 12 inches across; several patches close together may form larger, irregular dead areas

Dead grass plants initially tan to light brown in color

Grass plants on the perimeter of the affected area are darker green and taller than the rest of the lawn

If spots are watered thoroughly, followed by reseeding, new grass plants usually germinate and successfully fill the original dead area

Occurs in areas where non-selective herbicides (kill all green plants) have been applied

Irregular to round patches of dry, tan grass; pattern of damage follows pattern of herbicide application

Affected grass plants are initially light tan to straw-colored; later turning dark brown

Usually a distinct boundary between affected and healthy plants

Weeds or other plants in the area are brown, dried up or dead as a result of applying these herbicides

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