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 "irregular spots or patches of brown, thin dying grass"
What are your symptoms?
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| Grass is thin and dying; feeding damage present on crown, stems, and roots and whitish frass may be seen; turf is easy to pull up but does not roll back; presence of whitish legless grubs | Feeding damage present around crown; leaves are chewed and cut around the crown; presence of caterpillars that curl up when disturbed | Lawn feels spongy; feeding damage on roots; turf can be easily rolled back like a carpet; presence of white, C-shaped grubs with legs | Leaves are tan or scorched from the tip down; pink fungal threads can be seen |