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How to Manage Pests

The UC Guide to Healthy Lawns

| Index to contents | Acknowledgments | Related UC publications | References |

Diagnosing problems on perennial ryegrass in spring

From "piles of soil or debris on surface"

What are your symptoms?

Castings on soil surface Mound with circular margin
Rough or bumpy lawn surface; presence of castings

Line of mounds or mound with circular margin

For similar symptoms, refer to vertebrates.

None of these symptoms

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