Please be sure to read the product label of any insecticide you choose to use to get information on the personal protective safety gear you will need. In most situations, it is recommended that you wear long pants, a long sleeved shirt, closed toe shoes with socks, chemical resistant gloves, and goggles. In areas where ventilation is poor, a manufacturer may recommend you wear a mask or a respirator. We have put together two different safety kits that will make selecting the correct safety gear easier for you.
Preventative fungicide treatments are most effective for this lawn disease. Applications of a fungicide to active powdery mildew areas will only protect new or unaffected grass, which will stop the spread of the disease, but will not get rid of existing powdery mildew.
Apply A Preventative Application
It's important to apply the appropriate fungicide before powdery mildew has taken hold of your lawn.
The best time of the year for this disease to develop is in the spring and fall, when temperatures are moderate and humidity is relatively high. Your local extension office can help you pinpoint the right time of year to treat for powdery mildew in your area.
If you missed the window before disease development, keep in mind that this disease will not harm your turf, and you can apply a preventative product the following season to control this unsightly disease from taking hold in your yard.
If powdery mildew is in full effect in certain areas in your lawn, you can still treat the surrounding turf, especially any in shaded areas that would be more susceptible to disease development.
Fungicide applications at this point will not cure the existing disease, but will help protect the emerging and unaffected grass, which is important in maintaining an even, green, and pleasing appearance.