Protect your Turf from Brown Ring Patch

Protect your Turf from Brown Ring Patch

Brown ring patch (Waitea Patch)
is a disease that primarily affects annual bluegrass and is becoming more common as each season passes. The causal pathogen Waitea circinata var. circinata is a member of the Rhizoctonia group of plant pathogens. Disease symptoms usually appear in spring or early summer when air temperatures approach 65-85°F (view the Soil Temperature Map for daily soil temperatures).  Infection results in the formation of yellow rings, a few inches to a foot in diameter, and turns brown and necrotic over time. The following guidelines and management practices are recommended to optimize the protection of your turf from brown ring patch.

Fungicide Applications
Depending on the climate and spring warm-up, applications should generally occur between March 15 and June 1.

Curative: Preventive applications are best, but depending on the fungicide; curative applications may also be successful. For more information, view results from Brown Ring Patch Trials at Fiddler’s Elbow Country Club. 

Recommended Fungicide Rates and Intervals





1.5–3.0 fl oz/1,000 ft2

 14–28 days

Heritage® TL

 1.0–2.0 fl oz/1,000 ft2

 14–28 days

Heritage 50WG

0.2 - 0.4 fl. oz/1,000 sq ft2

14–28 days

Medallion®, or Banner Maxx® II fungicides may also be utilized as tank-mix partners with the recommendations above to broaden the spectrum of disease control.

Results from various preventive treatments are summarized in the chart below.
BRP_data_McDonald_2008Preventive treatments were applied on February 8, March 19, April 2 and April 27, 2008.

** Brown ring patch was rated on a 0 to 100 scale where
0 = no disease and 100 = entire plot

 ©2013 Syngenta. Important: Always read and follow label instructions before buying or using Syngenta products. The label contains important conditions of sale, including limitations of remedy and warranty. Syngenta supports a FIFRA Section 2(ee) recommendation for use of Heritage TL, Headway and Medallion on Brown Ring Patch on turf. Please see the Section 2(ee) recommendation to confirm that the recommendation is applicable in your state. Banner MAXX®, Headway®, Heritage®, GreenCast®, Medallion® and the Syngenta logo are registered trademarks of a Syngenta Group Company. 3336 is a trademark of Cleary Chemical Corporation.26GT® is a registered trademark of Bayer.

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