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How to Manage Pests

The UC Guide to Healthy Lawns

Dull mower blades

Dry appearance of lawn

Ragged grass blades from a dull mower blade
Photos by Steve Cockerham

Click on images to enlarge.


Lawns injured by dull mower blades turn somewhat gray soon after they are mowed. Leaf tips are torn or shredded and eventually turn yellow to brown in color and die. Turf weakened by mower blade injury will be more susceptible to drought or diseases.

Prevention and management

Inspect leaf blades regularly after mowing. Sharpen mower blades as needed. Avoid mowing under drought conditions or when the leaf blades are wet.

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

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