Golf Course Management

FEB 2018

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

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84 GOLF COURSE MANAGEMENT 02.18 • Reduce the interval between sprays and/or increase fungicide rates when disease pres - sure is high. Following these strategies will help reduce the potential for developing fungicide-resis - tant strains of Colletotri um cereale on the golf course. Funding This work was supported by the USDA National Institute of Food and Agriculture Hatch Multistate Project 0206183 through the New Jersey Agricultural Experiment Sta - tion, Hatch Multistate Project NJ12294. The authors thank the Environmental Institute for Golf, GCSA of New Jersey, Tri-State Turf Re - search Foundation, United States Golf Asso- ciation, the New Jersey Turfgrass Association Combination products currently available for anthracnose control Common name Trade name(s) FRAC code a Efficacy b Product 1 Product 2 Product 3 Product 4 Azoxystrobin chlorothalonil — — Renown (Syngenta) 11 + M5 2.5 Azoxystrobin propiconazole — — Headway (Syngenta), Goliath (UPI) 11 + 3 3 Chlorothalonil acibenzolar-S-methyl — — Daconil Action (Syngenta) M5 + P1 3 Chlorothalonil iprodione thiophanate-methyl tebuconazole Enclave (Quali-Pro) M5 + 2 + 1 + 3 3.5 Chlorothalonil propiconazole — — Concert II (Syngenta) M5 + 3 3 Chlorothalonil thiophanate-methyl — — ConSyst (Regal), Spectro (Nufarm), TM/C (Quali-Pro) M5 + 1 2.5 Fosetyl-Al chlorothalonil — — On-site tank-mix c 33 + M5 3.5 Fluoxastrobin chlorothalonil — — Fame C (FMC) 11 + M5 3 Fluoxastrobin myclobutanil — — Disarm M (FMC) 11 + 3 3 Fluoxastrobin tebuconazole — — Fame+T (FMC) 11 + 3 3 PCNB tebuconazole — — Oreon (AMVAC) 14 + 3 3.5 d Pyraclostrobin boscalid — — Honor Intrinsic (BASF) 11 + 7 1/3 e Pyraclostrobin fluxapyroxad — — Lexicon (BASF) 11 + 7 1/3 e Trifloxystrobin triadimefon — — Tartan (Bayer) 11 + 3 2 Note. The list of products in this table is not intended to be complete. Other turf fungicide products/trade names containing the same active ingredients may also be available. a FRAC codes indicate the biochemical mode of action, according to the Fungicide Resistance Action Committee (www.frac.info/). M5 indicates multisite inhibitor, and P1 represents a plant defense-inducing product. NC, not classified. b Efficacy of fungicides labeled for the control of anthracnose based on a 1-4 scale, where 1= inconsistent control, 2 = fair to good control, 3 = good to excellent control, and 4 = consistently good to excellent control in published studies (32). Additional combination products labeled for anthracnose control, but for which published data on effectiveness is limited, include: Heritage Action (azoxystrobin + acibenzolar-S-methyl, Syngenta), Briskway (azoxystrobin + difenoconazole, Syngenta), ZOXY-T and StrobeT (azoxystrobin + tebuconazole, ArmorTech and Quali-Pro, respectively), Instrata (chlorothalonil + fludioxonil + propiconazole, Syngenta), E-Pro ETQ (chlorothalonil + iprodione, SipcamAdvan), E-Scape ETQ (chlo - rothalonil + tebuconazole, SipcamAdvan), Exteris Stressgard (fluopyram + trifloxystrobin, Bayer), TMI (iprodione + thiophanate-methyl, ArmorTech), Interface Stressgard (iprodione + trifloxystrobin, Bayer), Pillar (pyraclostrobin + triticonazole, BASF), and SysStar (thiophanate-methyl + flutolanil, Regal). c Represents an efficacious combination of two individual products (not currently sold as a combination product) that can be tank-mixed by turf managers on site. d Do not apply to cool-season turf when daytime temperatures are 85 F or higher. Add a pigment to Oreon (for example, PAR) to mask chlorosis, which may occur at the high label rate. After application, immediately irrigate with 0.25-inch water. e Lower efficacy rating applies when fungicide-resistant isolates of Colletotrichum cereale are present. Table 2. Combination products currently available for anthracnose control. and Rutgers Center for Turfgrass Science for the financial support of this work. Acknowledgments The authors acknowledge the contribu- tions of Joseph A. Roberts, Charles J. Schmid, James W. Hempfling, Ruying Wang and Kyle Genova. Literature cited 1. Aynardi, B., J. Inguagiato, S. McDonald, B. Clarke and W. Uddin. 2016. Lessen your anthracnose struggles. Golfdom 72 (March 11). (www.golfdom.com/lessen- your-anthracnose-struggles) Accessed Jan. 6, 2018. 2. Backman, P., G. Stahnke and E. Miltner. 2002. Anthracnose update: Cultural practices affect spread of disease in Northwest. Turfgrass Trends 11:T1-T2, T4. 3. Carrow, R.N., D.V. Waddington and P.E. Rieke. 2001. Turfgrass soil fertility and chemical problems. John Wiley & Sons, New York, p. 218. 4. Chen, X. 2016. Influence of seasonal N fertilization, plant growth regulators, and fungicide application timing on anthracnose severity of annual bluegrass putting greens. Master's thesis 996. University of Con - necticut (http://digitalcommons.uconn.edu/gs_the- ses/996) Accessed Jan. 6, 2018. 5. Clarke, B.B., P.R. Majumdar, S. Flatley, M. Mus, G. Rappa, G. Groben, M. Peacos, T.J. Lawson, J.B. Clark and S. Butterworth. 2015. Anthracnose control with fungicides and biorational products on annual blue - grass putting green turf, 2014. Pages 235-256. In: A.B. Gould, ed. Rutgers Turfgrass Proceedings 2014. Vol. 46. Center for Turfgrass Science and the New Jersey Turfgrass Association, New Brunswick, N.J. 6. Crouch, J.A., B.B. Clarke and B.I. Hillman. 2006.

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