Disease Identifier
ANTRACNOSE
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TIPS FOR UNDERSTANDING AND CONTROL Reddish-brown spots on leaves; Blighted areas of lawn can vary in size from 2 inches to 10 feet
CONDITIONS FOR DISEASE TO APPEAR* Warm to hot weather (80 to 90 degrees); Excess rain; Poor drainage; Under-fertilization
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
BROWN PATCH
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TIPS FOR UNDERSTANDING AND CONTROL Leaves and stems die out in large, circular patches in lawn; One of the most common diseases of fescue lawns
CONDITIONS FOR DISEASE TO APPEAR* Warm to hot weather (75 to 95 degrees); High humidity; Excess rain
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
COPPER SPOT**
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TIPS FOR UNDERSTANDING AND CONTROL Grass blades develop small red spots that enlarge and become darker red; Grass is infested in small, circular patches 1 to 3 inches wide; Grass within the spots dies; Can look like dollar spot
CONDITIONS FOR DISEASE TO APPEAR* Mild to warm temperatures (70 to 80 degrees); High humidity
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
DOLLAR SPOT
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TIPS FOR UNDERSTANDING AND CONTROL Grass dies in small, circular spots 4 to 12 inches wide; Spots may fuse together in big blotches
CONDITIONS FOR DISEASE TO APPEAR* Mild to warm weather (60 to 85 degrees); Excess moisture; Under-fertilization
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
POWDERY MILDEW**
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TIPS FOR UNDERSTANDING AND CONTROL White to light gray moldy-looking growth on grass blades
CONDITIONS FOR DISEASE TO APPEAR* Mild temperatures (65 degrees); Damp weather and excess moisture; Shady areas
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
RED THREAD
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TIPS FOR UNDERSTANDING AND CONTROL Tan to bleached-looking grass blades that shrivel from the tips; Small patches of dead grass; In wet weather you may see small pink thread in the grass
CONDITIONS FOR DISEASE TO APPEAR* Mild temperatures (60 to 75 degrees); High humidity; Misty weather; Under-fertilization
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
RUST
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TIPS FOR UNDERSTANDING AND CONTROL Dust-like orange-colored spores cover grass blades; Affected areas of lawn have a rusty look; Doesn't usually hurt the grass, but is a nuisance
CONDITIONS FOR DISEASE TO APPEAR* Mild temperatures (60 to 75 degrees); Dry weather or conditions that favor the slow growth of grass
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
STRIPE SMUT**
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TIPS FOR UNDERSTANDING AND CONTROL Grass blades turn pale green and are stunted; Spores form long black stripes on grass blades; Grass blades curl and die
CONDITIONS FOR DISEASE TO APPEAR* Cool temperatures (50 to 60 degrees); Excess moisture
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
SUMMER PATCH OR FROG-EYE DISEASE
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TIPS FOR UNDERSTANDING AND CONTROL Grass forms light green patches up to 24 inches wide that later turn a reddish brown; Some patches may have circle of green grass in center
CONDITIONS FOR DISEASE TO APPEAR* Warm temperatures (80 to 95 degrees); High humidity; Drought-stressed grass
BAYER ADVANCED™ SOLUTION Bayer Advanced™ Fungus Control for Lawns Granules |
* Over fertilizing and heavy thatch also encourage disease.
** Reprinted with permission from the American Phytopathological Society, St. Paul, MN.