Fall in Georgia brings cooler temperatures and beautiful foliage, but it also creates the perfect conditions for certain lawn diseases to thrive. If you have warm season grasses like Zoysia or Bermuda, October is a critical month to watch for signs of trouble. One of the most common culprits this time of year is Zoysia Patch, a fungal disease that can quickly damage your lawn if left untreated. 

What Is Zoysia Patch?

Zoysia Patch, also known as Large Patch, is caused by the fungus Rhizoctonia solani. It typically appears in the fall when soil temperatures drop below 70°F and moisture levels rise. This disease targets the roots and crowns of Zoysia grass, leading to circular patches of brown or orange turf that can expand rapidly.

You'll often notice the outer edges of the patch turning a reddish-brown color while the center may appear slightly sunken. These symptoms are most visible in the early morning when dew is present.

Why October Is Prime Time for Lawn Disease

October's cooler nights and increased rainfall create ideal conditions for fungal growth. Lawns that are overwatered, poorly drained, or have excessive thatch are especially vulnerable. If you've recently fertilized with high nitrogen content, that can also stimulate fungal activity. 

Other diseases to watch for in October include:

  • Dollar Spot: Small, silver-dollar-sized patches that merge into larger areas.
  • Brown Patch: Similar to Zoysia Patch but affects fescue and other cool-season grasses.
  • Pythium Blight: Slimy, greasy-looking patches that spread quickly in humid conditions.

How to Prevent and Treat Zoysia Patch

The best defense against Zoysia Patch is proactive lawn care. Here are a few tips to keep your turf healthy:

  • Avoid late-season nitrogen fertilization. This can encourage fungal growth.
  • Improve drainage. Aerate compacted soil and reduce thatch buildup.
  • Water wisely. Water early in the day and only when necessary.
  • Apply fungicide. Preventative treatments in September and October can stop the disease before it spreads.

If you suspect Zoysia Patch, contact a professional lawn care service for diagnosis and treatment. Early intervention can save your lawn and prevent costly repairs in the spring.

Act Now Against Lawn Disease

October is a beautiful time in Georgia, but it's also when your lawn is most vulnerable to disease. By staying alert and taking preventative steps, you can protect your turf and keep it looking great year-round. Don't wait until spring to fix fall damage. Act now to keep your lawn healthy through the seasons. 

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