Fairy Ring Solutions | GreenCast | Syngenta
Symptoms and Causes

Fairy ring is unique because its symptoms are not directly caused by fungal pathogens. Rather, pathogens cause symptoms indirectly by changing the chemical and physical properties of the soil. Because causes and symptoms vary, preventive applications provide the best control.

A Preventive Strategy

Because fairy ring in turf causes symptoms indirectly by changing soil properties, curative fungicide applications can be unreliable. Once symptoms appear, suppression requires additional steps, such as cultivation and/or a soil surfactant application, to correct soil properties and encourage turf recovery.

That's why, for best control of fairy ring, a preventive strategy should be used.

Preventive fairy ring management is a two-phase process:
1. Prevent the fairy ring fungus from growing
  • Begin applications early in the season when soil temperatures reach 55°F to 60°F.
  • Determine how deep the fairy ring infestation is for watering-in product applications.
    • The depth of the infestation can be determined using a soil profile sample or plug from a symptomatic area. After incubation in a dark, humid environment for several days, mycelium growth in the thatch and/or soil will indicate the depth of infestation.
    • 0.1-0.15” of irrigation is needed if limited to the thatch layer
    • 0.25” of irrigation if 2-3” deep in soil
2. Maintain thatch and soil properties favorable for turf health
  • Apply soil surfactants regularly to maintain soil conditions that help provide uniform soil moisture and optimize healthy turfgrass growth.
  • Note: preventive fungicide applications don’t necessarily require tank-mixing with a soil surfactant, but curative applications generally do.
Get Soil
Alerts for Fairy Ring
Fairy Ring Sign up
Sign Up Here

Anchor of a Solid Fairy Ring Solution

Velista fungicide belongs to the SDHI class of chemistry and is recommended as the foundation of a preventive fungicide program to combat fairy ring. For best results controlling fairy ring in turf:

  • Water in 0.5 oz. of Velista per 1,000 ft2.
    • Provides 28 days of effective fairy ring prevention
    • It also controls several other soil-borne diseases (summer patch, spring dead spot and Rhizoctonia zeae).
    • Foliar diseases like brown patch, dollar spot and anthracnose require foliar applications of Velista.

Season-long Control

A well-rounded agronomic program including these treatments can provide season-long, preventive control of fairy ring while protecting your turfgrass from various biotic and abiotic stresses. Such programs strategically rotate Velista with the following products and rates1:

Rate per 1,000 ft2
Water volume
Watering in
0.5 - 0.7 oz.
2 gallons
Should be watered-in
immediately after application
Preventive 0.72 fl. oz.
Curative: 1.2 fl. oz.
2 gallons
1.5 - 3 fl. oz.
2 gallons
Can dry on foliage then
watered-in before next mowing
Heritage® ActionTM 
0.4 oz.
2 gallons

Timing and product rotation can vary by geography and grass type, but they are the most important factors for getting the most out of your applications.

By following an agronomic program tailored to your specific region and grass type it is possible to eliminate the need for localized fairy ring applications. To review Syngenta agronomic programs that include fairy ring control, click here.

1 Chart reflects treatment rates commonly recommended in the marketplace

Fairy Ring Webinar: Earn 0.1 GCSAA education points with this webinar. Lane Tredway, senior technical manager for Syngenta, discusses how to better control fairy ring by using Velista as part of a preventive turf management program.

Download the Preventive Fairy Ring Assurance Sheet

Preventive Fairy Ring Assurance Sheet

Download PDF
Additional Resources

Understanding when to water-in plant protection products

When applying a fungicide for fairy ring control, it’s important to determine the depth of the fairy ring infestation. If fairy ring is limited to the thatch layer, irrigate with 0.1-0.15 inches of water following the fungicide application.

Control fairy ring with a programmatic approach

Fairy ring is a chronic problem on golf course putting greens across the United States. 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.