Waitea Patch (also known as Brown ring patch) forms as yellowing rings of around 20 - 40cm in diameter that often coalesce into large, odd shapes. It is a fungal disease that affects the leaves, stem, crown and upper roots. It only appears in the summer and is triggered by high heat and humidity. It normally needs temperature of about 24 degrees plus and a humid environment.
It is very similar in appearance to Superficial Fairy Rings. The way to tell the difference between Waitea Patch and Superficial Fairy Ring is that Waitea Patch is a leaf disease and therefore it does not cause a depression In the surface.
Symptoms | Tan to dark patches. When humid conditions are present a brown/grey smoke ring may develop around the edge. |
Susceptible grass species | All species of grass are susceptible. |
When does it appear? | In the summertime. |
Climate conditions | Warm and humid weather. |
Turf Condition | Poor drainage or water soaked grass. |
Causes
Waitea Patch forms as yellowing rings of around 20-40cm in diameter that often coalesce into large odd shapes (I often say that they look like Teletubbies).
It is a fungal disease that affects the leaves, stem, crown and upper roots.
It only appears in the summer and is triggered by high heat and humidity.
It needs temperatures of about 24 degrees plus and a humid environment.
Cultural Control
Waitea Patch will grow out, keep the turf healthy and do not underfeed it.
We recommend using stress relief products such as Vitax Amino-Sorb F, ICL Vitalnova Stress Buster or Prestige Super Seaweed
Reduce surface humidity by regular sorrel rolling.
Chemical Control
There are no label approvals for fungicides.
Prevent creating a humid environment by setting irrigation early in the morning when it is cool rather than in the evening.
Use plant protection safely. Always read the label and product information before use.
