Problem: Colored Lines in Lawn
Colored streaks related to lawnmower or spreader use can have several causes: 1. Mowing a lawn under stress. The wheels of a lawn mower can damage the grass blades when lawns are under stress from heat or drought, causing them to turn yellow where the wheels pressed. 2. Fertilization misses. Granulated fertilizer does not move sideways in soil, but only feeds the lawn where each granule drops. Missed areas remain lighter green as the rest of the lawn greens up after the feeding. 3. Disease spread by wheels. Some lawn diseases, most commonly Pythium blight, can be spread by wheels on lawnmowers or spreaders. When spread this way, the disease appears in the wheel tracks.
The numbered solutions below correspond to the numbered items in the Problem. 1. In hot weather, mow the lawn early or late in the day, when temperatures are cooler. Don''t mow when the lawn is under drought stress. 2. Overlap wheel tracks when spreading fertilizer with a drop spreader. Place the wheel inside the previous wheel track for continuous coverage. Spread just before watering, when the grass will remain pressed down longer, or when dew is on the grass to make the tracks easier to see. 3. Don''t walk on or mow lawns with active pythium blight.