Fusarium in UK Lawns: A Common Turf Disease
Fusarium, often referred to as “Fusarium Patch” or “Microdochium Patch,” is a common fungal disease affecting lawns across the UK. This turf disease is primarily caused by the fungus Microdochium nivale and can be a major problem for homeowners and groundskeepers who aim to maintain a healthy, green lawn. Understanding the causes, symptoms, and control measures is essential for effective lawn care and prevention.
Causes of Fusarium Patch
Fusarium thrives in cool, damp, and humid conditions, making it particularly problematic during the autumn and winter months in the UK. The disease is often triggered by several factors:
• Poor Drainage: Waterlogged lawns provide ideal conditions for the fungus to develop.
• Excess Thatch: A thick layer of thatch can trap moisture, creating a damp environment for the fungus.
• Compacted Soil: Compacted soil limits proper drainage and air circulation, encouraging fungal growth.
• Over-fertilisation: High nitrogen levels can promote lush, soft grass growth, which is more susceptible to infection.
Symptoms of Fusarium Patch
The primary symptom of a fusarium infection is the appearance of small, circular patches of yellow-brown or white grass. These patches can range from a few centimeters to several inches in diameter. In advanced cases, the infected areas may merge, creating larger dead zones across the lawn. Other signs include:
• Slimy, Wet Grass: In damp conditions, infected grass may appear slimy.
• White or Pink Mycelium: In severe cases, a white or pinkish fungal growth can be seen on the grass, particularly in the morning when dew is present.
• Discoloration: The grass in affected areas often turns a yellow or light brown, indicating damage.
Prevention and Treatment
Preventing fusarium is easier than treating it, so proactive lawn care is crucial:
1. Improve Drainage: Aerate the lawn regularly to reduce soil compaction and enhance drainage.
2. Remove Thatch: Use a scarifier to remove excess thatch buildup, allowing better air circulation.
3. Mow Correctly: Avoid cutting the grass too short, particularly in autumn and winter, to reduce stress on the turf.
4. Moderate Fertiliser Use: Apply a balanced fertiliser, reducing nitrogen inputs in cooler months to discourage soft growth.
5. Fungicides: For severe cases, applying a suitable fungicide can help control the spread of the disease. It’s important to follow product instructions carefully and use fungicides as a last resort.
Long-term Management
Regular lawn maintenance, including proper mowing, aeration, and fertilisation, is key to preventing fusarium from returning. Keeping the lawn healthy, with good airflow and adequate drainage, will reduce the conditions that encourage fungal diseases. In the UK climate, autumn and winter are critical periods for monitoring and managing fusarium to ensure a green and healthy lawn year-round.
Fusarium patch can be frustrating, but with attentive care and preventive measures, it’s possible to keep this disease at bay and maintain a lush lawn.
