Take-All Root Rot is a fungal disease that lives in the soil and attacks turf when conditions are favorable. Most commonly found in St. Augustine lawns, it can also be found in Bermuda and even Zoysia lawns.
What causes take-all root rot?
Take-All Root Rot is caused by the fungal pathogen Geaumannomyces graminis and is found in Bryan, College Station, and throughout Texas. Favorable conditions that allow for this attack on turf include:
- Excessive rain during cool periods 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
What are the symptoms of root rot?
image of take-all root rot up close yellow and dying grass with exposed rootsSymptoms 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 continues to progress throughout your lawn, the areas affected will turn brown and die.
How to fight root rot?
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.