N.E. Christians and Rodney St. John
This is the fourth full year of data from the fairway height bentgrass Cultivar trial established in the fall of 1998. The area was maintained at a 0.5 in. mowing height. This is a National Turfgrass Evaluation (NTEP) trial and is being conducted at several research stations in the U.S. It contains 26 of the newest seeded cultivars and a number of experimentals. The cultivars are maintained with 4 lbs of N/1000 ft2/growing season. Fungicides are used as needed in a preventative program. Herbicides and insecticides also are applied as needed.
The visual quality was evaluated monthly in 2002 from May through October (Table 1). The values listed under each month in Table 1 are the averages of visual quality ratings made on three replicated plots. Visual quality was based on a scale of 9 to 1: 9 = best quality, 6 = lowest acceptable quality, and 1 = worst quality. The yearly average of the monthly data for each cultivar was calculated and is listed in the last column (Mean). The first cultivar listed in Table 1 had the highest average visual quality rating for the entire 2002 season. The cultivars are listed in descending order by average quality. The last row states the LSD (least significant difference), which is a statistical measurement of how widely the datum in each column must vary before they are considered to be different from one another.
Data for genetic color (Gencolor) and leaf texture (Leaftex) were also collected in June 2002. Genetic color was rated using a 9 to 1 scale with 9 = dark and 1 = light green. Leaf texture was assessed with a 9 to 1 scale with 9 = fine and 1 = coarse texture. Spring greenup (Greenup) data were taken in April 2002 and were estimated using a 9 to 1 scale with 9 = green and 1 = dormant turf. This trial will be replaced with a new fairway height bentgrass trial in 2003.
Table 1. The 2002 ratings for cultivars in the 1998 Fairway Height Bentgrass Trial
| -----------------------------Quality----------------------------- | ||||||||||
| Bentgrass Cultivar | GREENUP | GENCOLOR | LEAFTEX | MAY | JUN | JUL | AUG | SEP | OCT | MEAN |
|---|---|---|---|---|---|---|---|---|---|---|
| --------------------------------------------------------------9-1; 9 Best----------------------------------------------------------- | ||||||||||
| IMPERIAL | 7.3 | 6.3 | 7.0 | 7.0 | 7.3 | 8.0 | 8.3 | 8.3 | 7.0 | 7.7 |
| BRIGHTON (SRX 1120) | 7.0 | 6.0 | 7.3 | 5.7 | 6.7 | 7.3 | 8.0 | 8.7 | 8.3 | 7.4 |
| PENN G-6 | 6.7 | 7.0 | 7.0 | 6.0 | 7.3 | 6.7 | 7.7 | 8.3 | 8.0 | 7.3 |
| CENTURY | 7.0 | 7.3 | 7.3 | 6.3 | 7.0 | 6.7 | 7.3 | 8.0 | 7.3 | 7.1 |
| GRAND PRIX | 6.7 | 6.7 | 7.0 | 6.3 | 7.0 | 7.3 | 7.0 | 7.0 | 8.0 | 7.1 |
| PST-0VN | 6.0 | 6.7 | 6.7 | 5.7 | 7.0 | 7.7 | 7.3 | 7.3 | 7.7 | 7.1 |
| SRX 1BPAA | 5.3 | 6.7 | 7.0 | 6.0 | 6.0 | 7.0 | 7.7 | 8.0 | 7.3 | 7.0 |
| BACKSPIN | 7.3 | 6.7 | 7.0 | 6.0 | 6.0 | 6.7 | 7.7 | 7.7 | 7.7 | 6.9 |
| L-93 | 6.0 | 7.0 | 7.3 | 5.7 | 7.0 | 6.3 | 7.7 | 8.0 | 7.0 | 6.9 |
| PENNCROSS | 5.7 | 6.7 | 6.3 | 6.3 | 8.0 | 7.0 | 7.0 | 6.0 | 6.3 | 6.8 |
| TRUELINE | 6.0 | 6.7 | 6.3 | 6.0 | 5.3 | 5.7 | 7.3 | 8.3 | 8.0 | 6.8 |
| SEASIDE II | 6.3 | 6.3 | 6.7 | 5.0 | 5.3 | 6.7 | 8.3 | 7.0 | 8.0 | 6.7 |
| SR 1119 | 6.7 | 6.7 | 6.3 | 5.7 | 5.7 | 6.3 | 7.3 | 7.7 | 7.3 | 6.7 |
| PROVIDENCE | 5.7 | 6.0 | 6.0 | 5.0 | 4.3 | 6.0 | 7.3 | 7.7 | 8.0 | 6.4 |
| PENNEAGLE | 6.3 | 7.3 | 7.3 | 5.0 | 7.3 | 5.7 | 6.0 | 7.0 | 6.0 | 6.2 |
| PRINCEVILLE | 6.0 | 6.7 | 6.7 | 5.3 | 6.7 | 6.0 | 6.7 | 6.0 | 6.7 | 6.2 |
| GLORY (PST-9HG) | 5.3 | 7.0 | 6.7 | 5.3 | 5.7 | 5.3 | 5.0 | 5.0 | 6.0 | 5.4 |
| GOLFSTAR | 5.0 | 7.0 | 6.0 | 5.0 | 4.0 | 5.7 | 5.7 | 6.0 | 5.7 | 5.3 |
| PST-9PM | 4.7 | 6.3 | 6.3 | 5.3 | 4.0 | 4.7 | 5.7 | 5.3 | 5.7 | 5.1 |
| ABT-COL-2 | 4.7 | 6.7 | 7.0 | 4.7 | 5.0 | 4.3 | 5.7 | 4.7 | 5.3 | 4.9 |
| SRX 7MOBB | 5.3 | 7.0 | 7.3 | 4.7 | 4.3 | 4.7 | 5.0 | 4.7 | 6.0 | 4.9 |
| TIGER | 4.3 | 7.0 | 7.3 | 5.0 | 4.3 | 4.3 | 4.7 | 5.0 | 5.3 | 4.8 |
| SRX 7MODD | 4.3 | 7.0 | 7.0 | 4.3 | 3.7 | 5.0 | 4.7 | 4.3 | 5.3 | 4.6 |
| SR 7100 | 5.0 | 7.0 | 6.0 | 4.7 | 4.0 | 4.0 | 4.7 | 5.0 | 4.7 | 4.5 |
| TIGER II (CIS AT-5) | 5.3 | 6.7 | 5.7 | 5.0 | 4.0 | 4.3 | 4.7 | 4.0 | 5.0 | 4.5 |
| SEASIDE | 4.7 | 6.0 | 6.3 | 3.7 | 4.0 | 4.3 | 4.3 | 4.3 | 4.7 | 4.2 |
| LSD | 1.9 | 2.3 | 2.9 | 0.9 | 1.2 | 1.8 | 1.4 | 1.6 | 1.2 | 0.8 |
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ISU Turfgrass:2003 Turfgrass Report | College of Agriculture |
Contents ©1995-2003, ISU Horticulture Department