Brown patch will unsurprisingly look like browned patches of turf. These patches resemble irregular circles that can range from a few inches to a few feet in diameter. The grass within the patch can die completely, giving it a sunken look. The grass in the center of the patch can also recover from the disease and grow back, which will give the patch a donut-like appearance. Check the grass blades for brown or grey lesions and curling. If you check early in the morning, you may see white fungal threads throughout afflicted areas.
The brown patch fungus is known to infect all types of cool-season grasses, like fescue, and certain types of warm-season grasses, like St. Augustine grass. Brown patch will thrive in hot, humid weather, and will take advantage of grass weakened by poor aeration, over-watering, poor drainage, and tightly compacted soil.
Before starting any treatment, be sure to wear your personal protective equipment, or PPE, and remember to keep all people and pets off the treated areas until dry.
Use a fungicide like Patch Pro as a treatment to stop and control the growth of lawn diseases and fungi. Patch Pro is a systemic fungicide, so it will absorb into the vegetation and attack the disease head on, leaving the plant unharmed.
To start, first calculate your treatment area’s square footage by measuring your treatment area’s length and width and multiplying them together. To get rid of brown patch, apply Patch Pro at the labeled rate of 1-2 fluid ounces per thousand square feet of treatment area. As a preventative treatment, we recommend using 1 ounce of Patch Pro per thousand square feet with enough to sufficiently treat the area. Typically, one gallon of water will treat 1,000 square feet. If brown patch is already established in your lawn, or if temperatures and humidity are particularly high, use 2 ounces per thousand square feet. This will control the established brown patch and prevent further spread in your lawn.
We recommend using a 1-gallon hand pump sprayer to apply Patch Pro since you will be making localized treatments rather than broadcasting over the entire lawn. First, open the spray tank and fill it about halfway with water. Add the proper amount of Patch Pro, close the sprayer, and shake to distribute the chemical. Then, open the sprayer and add the remaining amount of water, up to the 1-gallon line. Close the sprayer and shake to ensure an even distribution of the chemical throughout the solution. Apply Patch Pro to areas affected by brown patch and surrounding areas to prevent spread. For preventative treatments, you may apply Patch Pro to areas that you know will be affected by brown patch when conditions become conducive for disease development. Also, treat areas in your lawn that are heavily shaded or have poor water drainage. Be sure to spray turf to the point of wet, and not runoff.
Make a follow-up application 14-21 days after your initial treatment. After about 2 weeks, you should see a noticeable reduction in size of afflicted turf.
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