Brown ring patch (Waitea patch)

Symptoms

Yellow to bronze rings and arcs from a few centimetres up to 60 cm across, mainly on annual meadow-grass (Poa annua), that can look like a smaller, yellower version of brown patch. Rings often turn tan and slightly sunken; in cool, wet spring weather a thin web of mycelium may be visible in early morning. Roots and crowns can be discoloured but the disease is usually foliar and recovers with growth, so it is mostly a problem on fine sports turf rather than home lawns.