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Issue link: http://gcmdigital.gcsaa.org/i/956160

74 GOLF COURSE MANAGEMENT 04.18 Colts Neck, N.J. Syringing treatments were ap- plied during August of each year at an approxi- mate rate of 0.03 to 0.05 inch (0.8-1.3 mm) of water per treatment when the ambient air tem - perature reached 85 F (29 C) or 90 F (32 C); reapplications were made every hour. Data were collected from thermal images using an FLIR thermal imaging infrared thermal camera on days when air temperatures reached 85 F and 90 F, which marked the highest temperatures in the day. All plots that received syringing treatments were compared to untreated plots that were not syringed. Air temperatures Syringing when air temperatures reached 85 F and 90 F reduced canopy temperatures by 6 F to 10 F (-14 C to -12 C) in 2015 and by 4 F to 11 F (-16 C to -12 C) in 2016, compared to plots that were not syringed. On a typical August day, the air temperature reached 85 F around 11 a.m., and the syringing treatment reduced canopy temperatures by 4 F in 2016 (Figure 1). When air temperature increased to 90 F by 2 p.m., the canopy temperature decreased by 6 F after syringing treatment in 2016 (Figure 2). When syringing was repeated at 3 p.m. and 4 p.m., canopy temperature was reduced by 6 F in both years. Canopy temperatures of a bentgrass putting green before syringing (A) and at one minute (B), 15 minutes (C) and 20 minutes (D) after syringing when air temperature was at 90 F in August 2016. This was a native (push-up) putting green in Colts Neck, N.J. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 80 82 84 86 88 90 92 94 96 98 Not syringed Syringed Time after syringing (minutes) Temperature (F) Canopy temperatures of turf syringed at air temperature of 90 F vs. turf with no syringing Figure 2. Comparison of canopy temperatures of non-syringed turf with turf syringed when air temperature increased to 90 F.

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