GreenCast Advisories | GreenCast | Syngenta


Fairy ring is a chronic problem on golf course putting greens across the United States. Both warm- and cool-season grasses are susceptible to fairy ring, and the disease is most damaging in the sandy soils that are preferred for putting greens. By creating optimal playing conditions for the golfer, we also create optimal growing conditions for fairy ring pathogens.

The traditional approach to fairy ring control is to wait for symptoms to appear, and then make a curative fungicide application tank-mixed with a soil surfactant. The problem is that most research trials show curative fungicides to be ineffective on fairy ring. By the time symptoms appear, the pathogen has changed the chemical or physical properties of the soil — so to cure fairy ring symptoms, the soil conditions have to be brought back to normal with cultivation, soil surfactants and irrigation.

Photo credit: Dr. Lane Tredway, Syngenta

Just like any other disease, fairy ring is best managed with a preventive program. The key time to start a preventive program is in the spring when soil temperatures reach 55° F, which is when fairy ring pathogens begin to grow through the thatch and soil. No single application will provide season-long control of fairy ring, so repeat applications are necessary to maintain suppression through the season.

Velista® fungicide, which belongs to the SDHI class of chemistry, offers highly effective fairy ring prevention as well as broad-spectrum activity against anthracnose, summer patch, dollar spot, Rhizoctonia spp. and many others.

  • Applications of 0.5 oz./1,000 ft.2 on a 28-day interval or 0.3 oz./1,000 ft.2 on a 14-day interval have provided excellent fairy ring prevention.
  • Applications targeting fairy ring should be watered-in immediately after application with 0.1” to 0.25” of irrigation, depending on the depth of fairy ring infestation.
  • Tank-mixing with a soil surfactant can be beneficial in locations with a history of severe fairy ring, but is not always necessary for preventive applications.

Programs incorporating Velista with other broad-spectrum fungicides like Headway®, Briskway®, Heritage Action™ or Heritage® TL now make it possible to manage fairy ring and other key diseases with the same applications, eliminating the need for applications just for fairy ring control. Syngenta agronomic programs are specifically designed to prevent the most prevalent diseases, including fairy ring, in the most effective and efficient manner based on turf species and climatic conditions.

To learn more about how to protect your golf course from turf disease, contact your local Syngenta territory manager.

©2018 Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties and/or may have state-specific use requirements. Please check with your local extension service to ensure registration and proper use. Briskway®, Headway®, Heritage Action™, Heritage®, Velista® and the Syngenta logo are trademarks of a Syngenta Group Company.

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