Do you have a St Augustine lawn and are seeing large, circular patches of dead grass? If so, you may be experiencing Large Patch Disease. In this video, I'll explain what causes this disease, how to identify it, and the best ways to treat it.

Large Patch Disease, also known as Rhizoctonia solani fungus, is a common issue that affects St. Augustine grass. This disease is caused by a soil-borne fungus that thrives in warm, moist conditions. The symptoms of Large Patch Disease include circular patches of brown, stunted, and thin grass, often with a yellow halo around the affected area.

The fungus infects the roots and crowns of the grass, leading to the death of the affected plant. This can cause large, unsightly patches to form in the lawn, hence the name Large Patch Disease. The disease can spread rapidly and can be difficult to control if not addressed promptly.

Factors that can contribute to the development of Large Patch Disease include:

Over-watering or poor drainage in the lawn High humidity and warm temperatures Excessive nitrogen fertilizer Overcrowding of the grass, which can reduce air circulation and increase humidity levels Mowing the lawn too short, which can weaken the grass and make it more susceptible to disease To prevent Large Patch Disease, it's important to maintain a healthy lawn with good cultural practices such as proper watering, fertilizing, and mowing. Additionally, avoiding over-fertilization and reducing humidity levels in the lawn can help prevent the development of the disease. If Large Patch Disease is already present in your lawn, there are fungicides available that can help control it, but it's important to follow the instructions carefully and reapply as necessary.

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