Dollar Spot turf disease

Lots of rain followed by warm, humid weather is an ideal environment for some disease activity to start in the lawn, today we are going to highlight Dollar Spot:

Dollar Spot on Kentucky bluegrass: Image by: Kevin Mathias

Dollar Spot

Some varieties of perennial ryegrass, Kentucky bluegrass & creeping bentgrass are highly susceptible to this disease which starts as light tan lesions with darker brown borders on the leaf of the grass. As the disease continues the lesions grow, eventually spreading over the leaf turning the infected turf blades light tan or even white from the tip down. The fungus spreads to neighboring turf blades eventually creating silver dollar size patches of infected turf which discolors (this tell tale sign is where the disease name has it’s origins: dollar spot). As the disease progresses, multiple patches may eventually form so close together that a large portion of the lawn is showing signs of dollar spot.

What you can do:

  • If your lawn tends to get dollar spot every year, you may opt for a preventative fungicide. Usually the target date of this product would be after a long period of rain in late spring, right before our weather turns warm and humid.
  • Add additional nitrogen to promote leaf growth. If you are one of our customers give us a call to see how we can help your lawn.
  • Water later in the morning and do not water daily (unless you have newly seeded areas or the temperatures warrant it).
  • Mow the lawn on a regular basis and try to only take 1/3 of the blade off at a time. This will help reduce stress to the lawn so it may better recover on it’s own.
  • When the temperatures reach over 85 for a consistent number of days, you may opt to water in the middle of the day briefly. This will not hydrate your lawn but rather help to reduce heat stress. Usually this method only needs done on the full sun areas.

If you have any questions, feel free to contact us.


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