Solutions for Diseases Root-infecting Pathogens
Fairy Ring Application timing for fairy ring begins in the spring when soil temperatures taken at 11:00 am at a 2” depth averages 65-70ºF on warm-season turf for five consecutive days. These applications should be watered-in with 0.125” to move fungicide down to where the fungi are active. The Envu program below provides guaranteed satisfaction and if your expectations are not met, please contact your Envu Distributor or Envu Area Sales Manager. In addition to the below fungicide recommendations for each root disease, golf course superintendents should consider incorporating Signature™ XTRA Stressgard ® . Applying Signature XTRA Stressgard can help mitigate damage from several root diseases by enhancing the plant’s photosynthetic efficiency and promoting stronger rooting. Improved photosynthesis supports overall turf health and recovery, while deeper, more resilient roots increase the plant's ability to withstand stress and disease pressure, making it a valuable addition to any root disease management program. Recent research has greatly advanced our understanding of root-infecting pathogens like pathogenic nematodes, Pythium species, and ectotrophic fungi (e.g., take-all root rot, summer patch, spring dead spot). These insights have led to improved management strategies, including the importance of preventive fungicide applications timed to pathogen activity at specific 2” soil temperatures, often well before symptoms appear. Root diseases are most severe when turf is stressed by factors like heat, traffic, or poor soil conditions, and diagnostic labs frequently detect multiple pathogens in affected samples. This highlights the need for a comprehensive approach that combines cultural practices with targeted fungicide use to manage both primary and secondary root pathogens.
Product and Use Rate per 1,000 sq. ft.
Application
Good
Better
Best
Ideal for fairways
Ideal for fairways or greens
Ideal for greens
1 st app (65-70°F soil temp for warm-season greens)
Tartan Stressgard 2 fl. oz. or Tarvecta TM 0.7 fl. oz.
Tartan ® Stressgard ® 2 fl. oz.
Tartan Stressgard 2 fl. oz.
2 nd app. (28 days later)
Densicor ® 0.196 fl. oz.
Kalida ® 0.4 fl. oz.
Resilia TM 4 fl. oz.
3 rd app. (28 days later)
Mirage ® Stressgard ® 1 fl. oz.
Densicor 0.196 fl. oz.
Fame ® 0.36 fl. oz. 1 or Tarvecta 0.7 fl. oz.
4 th app. (28 days later)
Densicor 0.196 fl. oz.
Kalida 0.4 fl. oz.
Resilia 4 fl. oz.
5 th app. (28 days later)
Kalida 0.4 fl. oz.
1 Fame can be substituted with Castlon TM , as both of these fungicides contain the active ingredient fluoxastrobin
PRO TIP : Consider adding wetting agents to your fairy ring program to address soil hydrophobicity and enhance fungicide movement deeper into the soil profile. Always most effective to have the wetting agent applied a week prior to soil-applied fungicides if possible
5
June 2025
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