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Home & Garden > Lawn Guide > Manage Pests > Diagnostic Key > Perennial Ryegrass, Spring

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How to Manage Pests

The UC Guide to Healthy Lawns

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Diagnosing problems on perennial ryegrass in spring

From "rings of dead grass or dark green bands of turf in lawn; may have mushrooms"

What are your symptoms?

White fungal mycelia Dark brown sclerotia
White fungal mycelia may be observed under the thatch; mushrooms may be present Reddish leaves; white mycelia and dark brown sclerotia may be seen in crown area

None of these symptoms

Statewide IPM Program, Agriculture and Natural Resources, University of California
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