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.