Powdery Mildew On Grass: How To Control Powdery Mildew In Lawns

Powdery Mildew On Grass: How To Control Powdery Mildew In Lawns

By: Jackie Carroll
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Powdery mildew disease in lawns is usually the result of trying to grow grass in a poor location. Caused by a fungus, the first symptoms are light spots on the blades of grass that may go unnoticed. As the disease progresses, you’ll see white patches that look as though they have been sprinkled with talcum powder. Let’s take a closer look at powdery mildew grass disease and how to control powdery mildew in lawns.

Treating Powdery Mildew on Grass

When your grass has white powder, fungicides for do a good job of temporarily eliminating the symptoms, but the disease returns if the growing conditions don’t improve. Grass is a sun-loving plant that grows best in open locations with good air circulation and plenty of light.

Powdery mildew grass disease takes hold in shady locations with little air movement. Watering late in the evening, so that the grass doesn’t have time to dry before nightfall, further encourages this disease.

Control powdery mildew in lawns by opening up the area to better air movement and more sunlight. To , prune or remove trees and shrubs that shade the grass. If this isn’t possible, consider the advantages of covering the area with instead of struggling to grow grass in a difficult area. The area under a tree is perfect for a mulch-covered shady retreat with and .

Tips to Control Powdery Mildew in Lawns

You can discourage powdery mildew on grass with a few cultural practices aimed at keeping the grass healthy in shady areas, but these methods are only effective in light or partial shade.

  • Reduce the amount of fertilizer that you use in shady areas. Grass grown in shade doesn’t use as much nitrogen as grass grown in sun.
  • Water shaded grass infrequently, but deeply. The soil should absorb the water to a depth of 6 to 8 inches.
  • Water the lawn early in the day so that the grass has time to dry completely before nightfall.
  • Allow the grass in shady areas to grow a little taller than the rest of the lawn. Wait until the blades are about 3 inches tall before mowing.
  • Over seed the existing grass with a mixture.

Take steps to treat powdery mildew as soon as you discover that your grass has white powder symptoms. If this powdery mildew grass disease is allowed to progress too long, it can spread and result in dead patches in the lawn.

Read more about General Lawn Care
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