Tag: Common Lawn Diseases

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Red Thread

Turf affected: All species of grass Symptoms: Pinkish red threads that form around the leaf blades and bind them together. Eventually, the affected turf will turn brown. The red threads are most visible when the turf is wet and you may see red spores on your mower and shoes. Disease occurrence: Early spring Management: The best...

Leaf Spot
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Leaf Spot

Turf affected:  Kentucky bluegrass (especially common bluegrasses), fescues and other lawn grasses Symptoms:  Small lesions on leaf blades. Dark coloured spots that eventually turn light tan but remain bordered by a dark brown outer edge. Eventually these plants die out and turn brown or straw coloured, this can occur in patches. Disease occurrence:  Spring, typically...

Fairy Ring
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Fairy Ring

Turf affected:  All species  Symptoms:  Large arcs or rings consisting of very green grass, dead grass, mushrooms, puffballs or a combination of all. Disease occurrence:  Late March to early November Management:  Remove desiccating organic matter such as tree stumps, rotting lumber, etc… from the soil before planting.  Provide proper fertilization (more nitrogen) and irrigation along...

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Dollar Spot

Turf affected:  Bluegrass and Ryegrass Symptoms:  Straw-colored patches 2 to 6 inches in diameter.  Hourglass shaped lesions with reddish-brown margins develop across the leaves. Disease occurrence:  Late March to early November. Management:  Drought soils and prolonged wet foliage are key factors for disease development, so water deeply but infrequently early in the day to allow...

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Dog Spot

Turf affected: All species.  Symptoms: When your pet urinates on your lawn, it can cause the grass to burn out and yellowish dead spots will appear due to the high levels of nitrogen in their urine. It’s worse with female dogs because they typically have stronger urine, and they usually revisit the same spots, but...

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Brown Patch

Turf affected:  Bluegrass, Fescue, and Ryegrass  Symptoms:  Circular brown patches up to 3ft in diameter that develop during hot, wet weather.  Infected leaves become dark, wilt and die quickly when the disease is active.  The entire patch will eventually become a brownish tan color. Disease occurrence:   Mid June to early September Management:  Avoid excessive fertilization...

Rust
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Rust

Turf affected:  Bluegrass, Ryegrass, and Tall Fescue  Symptoms:  Small yellow specks on leaves and stems develop into orange or red pustules.  Heavily infected lawns may have an orange or reddish hue, and the lawn may begin to thin out.  This “rust” will be visible on shoes and mowers after being on the lawn. Disease occurrence: ...

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