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Table 1.

Effect of rolling on dollar spot (DS) incidence on golf greens on Vallda GC (Sweden) and Roskilde GC (Denmark) in 2017.

Rolling ------------------ Vallda GC ------------------ ---------------------- Roskilde GC ----------------------
DS infection centres Ball roll Percentage of plot covered with DS, %
5 June 18 Aug. 12 Sept. AUDPC 18 Aug. 12 June 5 July 7 Aug. 14 Sept. 26 Oct. AUDPC
No rolling 0 33 a 126 a 2329 a 247 a 0.2 1.1 4.2 27.7 10.5 893
2x/ wk 0 10 b 58 b 1187 a 298 a 1.4 2.5 2.4 19.5 5.8 649
4x/ wk 0 2 c 6 c 102 c 308 b 1.4 6.5 6.2 15.0 4.0 336
p 0.001 0.001 0.005 0.000 0.237 0.446 0.364 0.155 0.285 0.142

†Area under disease progress curve (AUDPC) from 18 Aug. to 12 Sept. 2017

‡AUDPC from 18 Aug. to 12 Sept. 2017

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