The presence of red or pink webbing or thread is the telltale sign of red thread. Red thread is a turfgrass disease most likely brought on by low levels of nitrogen in the soil. Red thread is a relatively harmless disease that can be used as a good indicator that it's time to fertilize the lawn.
Conditions Favoring Red Thread
- Low levels of nitrogen
- Temperatures between 68˚ and 75˚
- High humidity
How to Control Red Thread
Cool season grasses like red fescue, ryegrass, Kentucky bluegrass, and bentgrass are most susceptible.
Lawn Diseases like Red thread can be treated with chemical fungicides, but the best way to deal with it is to fertilize with adequate nitrogen, maintain a pH level of 6.5 - 7.0 and water deeply in the early morning.