How to Treat Powdery Mildew on a Grass Lawn Turf Yard
- 1). Examine your lawn and the soil. If the ground is wet or water has pooled in low-lying areas, the lawn may be suffering from poor drainage or you may be watering it at the wrong time of day. Powdery mildew thrives in damp or soggy lawns. To prevent further infestations, use topsoil to fill in low spots in the lawn, then consult a professional landscaper about correcting a poor soil drainage problem. Never water your lawn in the evening; the water saturates the ground and attracts fungi such as powdery mildew. Always water early in the morning so the sun can gradually dry the lawn over the course of the day.
- 2). Apply a fungicide such as mancozeb, following the instructions on the container carefully. Powdery mildew is a difficult fungus to eradicate, so be prepared to apply the fungicide every four to six days for up to three weeks.
- 3). Protect your garden plants from powdery mildew by spraying them with a baking soda mixture. Mix together one quart water, one tsp. baking soda and a few drops of liquid soap in a spray bottle. Spray the top and underside of your flowers and other plants once a week. The baking soda creates a surface pH that prevents powdery mildew spores from attaching themselves to your plants.