Couchgrass decline / take-all root rot

What to look for

• Slow growth, yellowing or leaf dieback developing into uneven patches or rings of declining turf.
• Areas turning tan, orange or brown, sometimes joining where shade, wear or drainage stress persists.
• Sparse, shortened or dark, rotting roots, with possible damage to spreading stems beneath the canopy.

Check the grass and site

This guide focuses on warm-season turf including couch, kikuyu, buffalo and seashore paspalum. The photographs show couch putting greens. Bentgrass take-all patch has its own identification guide.

Confirm it before you treat it

Check the grass species and compare the roots of healthy and declining plants. Drought, waterlogging and other root diseases can produce similar symptoms. A turf adviser or diagnostic service can assess affected plants alongside the watering, weather and maintenance history.

What to do next

1. Reduce stress by reviewing mowing height and limiting repeated traffic over weak areas.
2. Improve drainage and manage irrigation to the condition of the root system, avoiding persistent saturation.
3. Use soil and nutrient information before changing fertiliser or applying lime; support recovery without guessing at deficiencies.

Conditions matter more than dates.

Prolonged cloudy, humid or wet weather, poor drainage and low light can favour decline. Close mowing and wear add stress. Once roots are damaged, turf may show moisture stress even after a period of adequate water availability.