Brown patch
Rhizoctonia solaniA fungal disease that causes circular brown patches, often with a darker "smoke ring" edge, in mild, humid weather in spring and autumn.
Identify
Lawn diseases: patches, rings and spots
Most lawn disease starts with conditions: humidity, wet leaves overnight, poor drainage. Match the symptoms first, then fix the conditions.
Symptoms
- Circular patches from about 5 cm up to a metre across
- A dark, smoky-looking ring at the edge of the patch, especially early in the morning
- Leaves that look water-soaked before turning dark brown
Fairy rings
Many fungi (Basidiomycetes)Rings or arcs of darker, faster-growing grass, sometimes with mushrooms or a ring of dead grass, caused by fungi breaking down organic matter in the soil.
Symptoms
- Circular or arc-shaped bands of darker green, faster-growing grass
- Sometimes a ring of dead or dry grass inside the green band
- Mushrooms or toadstools appearing in a ring after rain