Take-All Root Rot is a fungal disease found in Bryan/College Station and throughout Texas. It is most commonly found in St. Augustine lawns; however, it can also be found in Bermuda and even Zoysia lawns.
Take-All Root Rot is caused by the fungal pathogen Geaumannomyces graminis. The fungus lives in the soil and attacks turf when conditions are favorable.
Favorable conditions that allow for the attack on turf include:
- excessive rain during cool period of the year
- nighttime irrigation schedules
- poor drainage
- septic spray heads
- heavy clay
- mild winter weather
- compacted soils
- excessive shade
- mower height too high
- temperature extremes
Symptoms of Take-All Root Rot are difficult to diagnose early in the year before the grass begins greening up, but becomes noticeable as the spring progresses with yellow, discolored grass. As the disease progresses the areas turn brown and die.
In early Spring 2017, many lawns in the area are experiencing this issue. In order to confront this issue, we recommend the following steps:
- Apply high quality fungicides specifically labelled for control or suppression of Take-all Root Rot applied in 14 day intervals during the spring (2), and 28 day intervals in fall (2).
- Topdress areas of infection with high quality compost in the spring and fall for 2-3 years. Mushroom compost is recommended. TAMU has stated the use of Sphagnum Peat Moss can be beneficial.
- Aerate the turf in May or June.
- Apply lower rates of Nitrogen, with higher rates of micro-nutrients and Potassium Magnesium in areas showing signs or symptoms.
- Limit the rate and use of herbicides in areas showing signs or symptoms.
Aggieland Green has successfully managed Take-All Root Rot in many lawns in Bryan/College Station over the years; we have the expertise to help our customers with this problem before it destroys their lawns.
If you feel you may have the symptoms of active Take-All Root Rot and you live in the Brazos Valley, feel free to contact us for help.