Table of Contents
As spring arrives, lawn owners often face the challenge of maintaining a lush, healthy yard. One common problem during this season is Dollar Spot Fungus, a fungal disease that affects many turfgrass varieties. Recognizing and treating this issue early can save your lawn from extensive damage.
Understanding Dollar Spot Fungus
Dollar Spot Fungus is caused by the pathogen Sclerotinia homoeocarpa. It thrives in warm, humid conditions with frequent watering and poor air circulation. The disease appears as small, circular patches of straw-colored or tan grass, often with a distinct border. In severe cases, these patches can merge, creating large areas of dead turf.
Signs and Symptoms
Early signs include tiny, silver-dollar-sized spots that quickly expand. The grass may develop a white, cottony appearance on the surface, especially in the early morning. As the disease progresses, the affected grass turns brown and dies, leaving behind visible patches that disrupt the uniformity of your lawn.
Environmental Factors
Warm temperatures between 60-75°F combined with high humidity promote Dollar Spot development. Excessive watering and frequent irrigation can create ideal conditions for the fungus. Poor drainage and compacted soil also contribute to the disease’s spread.
Prevention Strategies
- Maintain proper mowing height to reduce stress on the grass.
- Water early in the day to allow the grass to dry before evening.
- Avoid overwatering and ensure good drainage.
- Improve air circulation by pruning trees and shrubs.
- Apply a balanced fertilizer to promote healthy growth.
Effective Treatment Options
If Dollar Spot Fungus appears on your lawn, prompt treatment is essential. Fungicides containing active ingredients like propiconazole, azoxystrobin, or chlorothalonil are effective. Always follow label instructions for application rates and frequency.
Application Tips
- Apply fungicides when the disease is first noticed for best results.
- Water the lawn after fungicide application to help penetrate the soil.
- Repeat treatments as recommended, typically every 14-21 days during high-risk periods.
- Alternate fungicides to prevent resistance buildup.
Long-Term Lawn Care Practices
Implementing good lawn care practices can reduce the risk of future Dollar Spot outbreaks. Focus on aeration, overseeding, and maintaining optimal soil health. Regular monitoring and early intervention are key to a resilient lawn.
Conclusion
Dollar Spot Fungus can be a persistent problem, but with proper identification, prevention, and treatment, you can restore your lawn’s health. Stay vigilant during the warm, humid months of spring and early summer to keep your yard green and vibrant all season long.