Spring dead spot and take-all root rot are among the most damaging diseases of bermudagrass putting greens throughout the transition zone. These diseases attack during the fall and spring when bermudagrass is growing slowly, with the potential to cause long-term reductions in playability. Both diseases begin to damage roots in the late summer to fall, so this is the key time to begin a preventative fungicide program. • Take-all root rot activity begins in mid- to late-summer when soil temperatures are consistently below 80°F. Typically August 15 to September 15 depending on location. • Spring dead spot activity begins in late summer to fall when soil temperatures drop to 70°F or less. With proper application timing and the best rotation of products, take-all root rot and spring dead spot can be managed very effectively as part of a program approach. Syngenta has developed this recommended program through years of research with the leading universities in the transition zone. Preventive late-summer to fall fungicide applications, prior to dormancy, are recommended to protect the turf from pathogen attack and ensure acceptable turf quality in the spring. Spring Dead Spot + Take-all Root Rot Guarantee
SPRING DEAD SPOT CONTROL IN ‘CHAMPION’ BERMUDAGRASS Jim Kerns, Ph.D. North Carolina State University, Raleigh NC
Posterity + Headway ® 0.32 + 1.5 fl oz/1,000 ft 2
Untreated
Posterity ® Forte 0.84 fl oz/1,000 ft 2
All fungicide treatments applied on Oct 17 and Nov 21, 2019. Photos taken on May 26, 2020
Introducing the Spring Dead Spot + Take-all Root Rot Guarantee for Bermudagrass Putting Greens in the Transition Zone
Application
Approximate Date
All rates are per 1,000 ft 2
1
August 15th
Briskway ® (1.2 fl oz)
2
September 15th
Posterity Forte (0.84)
3
October 15th
Posterity Forte (0.84)
4
November 15th
Headway (1.5 fl oz)
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