Results of Regional Kentucky Bluegrass Cultivar Trials
Rodney A. St. John, Nick E. Christians, and David D. Minner
The National Turfgrass Evaluation Program (NTEP) has sponsored several regional Kentucky bluegrass cultivar trials conducted at most of the northern agricultural experiment stations. Two high-maintenance trials were underway during the 2000 season. The first, a high-maintenance study, was established in 1995 and completed in July of 2000. The second is a new high-maintenance study that was established in fall 2000. It contains 173 cultivars. Both studies received or will receive 4 lb N/1000 ft2/yr, and were irrigated as needed. The objective of these high-maintenance, irrigated studies is to investigate cultivar performance under a cultural regime similar to that used on irrigated home lawns in Iowa.
The values listed under each month in Table 1 are the averages of visual quality ratings made on three replicated plots for the first study. Visual quality was based on a scale of 9 to 1: 9 = best quality, 6 = lowest acceptable quality, and 1 = worst quality. Yearly means of monthly data were taken and are listed in the last column. The first cultivar received the highest average rating for the entire 2000 season. The cultivars are listed in descending order of average quality.
Data for genetic color (Gcol) and leaf texture (Leaf) also are included for the 1995 high-maintenance trial. 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.
Data for the 2000 high-maintenance study are included in Table 2. The cultivars are listed in descending order according to percentage bluegrass cover in October, 2000.
Table 1. 2000 visual quality1 and other ratings2 for the 1995 High-maintenance Kentucky Bluegrass Trial.
|
Visual quality |
||||||
|
Cultivar |
Gcol |
Leaf |
June |
July |
Mean |
|
|
1 |
Award |
8.7 |
8.7 |
8.7 |
8.7 |
8.7 |
|
2 |
Midnight |
8.7 |
8.3 |
9.0 |
8.3 |
8.7 |
|
3 |
Total Eclipse (TCR-1738) |
8.7 |
8.7 |
8.7 |
8.7 |
8.7 |
|
4 |
Absolute (MED-1497) |
8.3 |
8.7 |
9.0 |
8.0 |
8.5 |
|
5 |
Impact (J-1576) |
8.7 |
8.3 |
8.7 |
8.3 |
8.5 |
|
6 |
Liberator (ZPS-2572) |
8.3 |
8.7 |
8.3 |
8.3 |
8.3 |
|
7 |
North Star (PST-A7-60) |
9.0 |
9.0 |
7.7 |
9.0 |
8.3 |
|
8 |
Quantum Leap (J-1567) |
8.7 |
8.7 |
8.0 |
8.7 |
8.3 |
|
9 |
NuGlade |
8.7 |
8.7 |
7.7 |
8.7 |
8.2 |
|
10 |
Arcadia (J-1936) |
8.0 |
8.3 |
8.0 |
8.0 |
8.0 |
|
11 |
Dragon (ZPS-429) |
8.7 |
8.7 |
7.3 |
8.7 |
8.0 |
|
12 |
NJ 1190 |
8.0 |
9.0 |
7.0 |
9.0 |
8.0 |
|
13 |
Seabring (Ba 79-260) |
8.7 |
8.7 |
8.0 |
8.0 |
8.0 |
|
14 |
Ba 73-373 |
8.7 |
8.7 |
7.3 |
8.3 |
7.8 |
|
15 |
Ba 75-163 |
7.7 |
8.3 |
7.3 |
8.3 |
7.8 |
|
16 |
Ba 81-220 |
8.3 |
8.7 |
7.3 |
8.3 |
7.8 |
|
17 |
Brilliant (PST-B2-42) |
8.0 |
8.3 |
7.0 |
8.7 |
7.8 |
|
18 |
H86-690 |
8.0 |
8.3 |
7.3 |
8.3 |
7.8 |
|
19 |
Pick 8 |
8.7 |
8.3 |
8.0 |
7.7 |
7.8 |
|
20 |
Showcase (PST-BO-141) |
8.0 |
8.0 |
7.7 |
8.0 |
7.8 |
|
21 |
Wildwood |
7.7 |
7.7 |
7.3 |
8.3 |
7.8 |
|
22 |
Abbey |
8.3 |
8.3 |
7.0 |
8.3 |
7.7 |
|
23 |
Apollo (PST-B3-180) |
8.0 |
8.0 |
7.3 |
8.0 |
7.7 |
|
24 |
Ba 70-060 |
8.0 |
8.3 |
7.7 |
7.7 |
7.7 |
|
25 |
Ba 81-270 |
7.7 |
8.0 |
7.3 |
8.0 |
7.7 |
|
26 |
Conni |
8.0 |
8.7 |
6.7 |
8.7 |
7.7 |
|
27 |
Glade |
7.7 |
8.0 |
7.3 |
8.0 |
7.7 |
|
28 |
Lipoa |
8.3 |
8.3 |
7.3 |
8.0 |
7.7 |
|
29 |
Moonlight (PST-A418) |
7.7 |
8.0 |
8.0 |
7.3 |
7.7 |
|
30 |
NuStar |
7.7 |
8.0 |
7.0 |
8.3 |
7.7 |
|
31 |
Odyssey (J-1561) |
8.0 |
8.3 |
8.0 |
7.3 |
7.7 |
|
32 |
Pepaya (DP 37-192) |
7.7 |
7.7 |
8.0 |
7.3 |
7.7 |
|
33 |
Rugby II (MED-18) |
8.0 |
8.0 |
7.7 |
7.7 |
7.7 |
|
34 |
Sidekick |
8.7 |
9.0 |
7.0 |
8.3 |
7.7 |
|
35 |
SR 2000 |
8.7 |
8.3 |
7.3 |
8.0 |
7.7 |
|
36 |
Unique |
7.3 |
8.3 |
7.3 |
8.0 |
7.7 |
|
37 |
ZPS-2183 |
8.7 |
8.0 |
7.7 |
7.7 |
7.7 |
|
38 |
Ba 77-702 |
8.7 |
8.3 |
7.0 |
8.0 |
7.5 |
|
39 |
Ba 81-113 |
7.7 |
8.3 |
7.0 |
8.0 |
7.5 |
|
40 |
Chateau |
8.0 |
8.3 |
7.3 |
7.7 |
7.5 |
|
41 |
Fortuna |
7.7 |
8.0 |
7.7 |
7.3 |
7.5 |
|
42 |
Haga |
7.0 |
7.3 |
7.0 |
8.0 |
7.5 |
|
43 |
Jewel (Ba 81-227) |
8.3 |
8.3 |
7.0 |
8.0 |
7.5 |
|
44 |
Livingston |
8.0 |
8.7 |
6.3 |
8.7 |
7.5 |
|
45 |
Pick-855 |
7.3 |
7.7 |
7.0 |
8.0 |
7.5 |
|
46 |
PST-P46 |
7.3 |
8.3 |
7.7 |
7.3 |
7.5 |
|
47 |
Sodnet |
7.7 |
8.7 |
7.0 |
8.0 |
7.5 |
|
48 |
A88-744 |
8.0 |
8.3 |
7.0 |
7.7 |
7.3 |
|
49 |
Ba 81-058 |
7.3 |
8.0 |
7.0 |
7.7 |
7.3 |
|
50 |
Challenger |
7.7 |
8.7 |
7.0 |
7.7 |
7.3 |
|
51 |
Rambo (J-2579) |
8.3 |
8.3 |
7.0 |
7.7 |
7.3 |
|
52 |
SR 2100 |
8.0 |
8.0 |
7.0 |
7.7 |
7.3 |
|
53 |
SR 2109 |
7.7 |
8.7 |
6.3 |
8.3 |
7.3 |
|
54 |
Ba 75-490 |
6.7 |
8.0 |
6.7 |
7.7 |
7.2 |
|
55 |
Ba 76-197 |
7.3 |
8.3 |
6.7 |
7.7 |
7.2 |
|
56 |
BAR VB 3115B |
7.3 |
8.3 |
6.0 |
8.3 |
7.2 |
|
57 |
BAR VB 6820 |
7.0 |
7.7 |
7.7 |
6.7 |
7.2 |
|
58 |
Baronie |
7.3 |
8.0 |
6.7 |
7.7 |
7.2 |
|
59 |
Bartitia |
7.0 |
7.7 |
7.7 |
6.7 |
7.2 |
|
60 |
Blacksburg |
7.0 |
7.7 |
8.3 |
6.0 |
7.2 |
|
61 |
Champagne (LTP-621) |
7.3 |
8.0 |
7.0 |
7.3 |
7.2 |
|
62 |
Explorer (Pick-3561) |
7.0 |
8.0 |
7.3 |
7.0 |
7.2 |
|
63 |
Goldrush (Ba 87-102) |
8.3 |
8.3 |
7.0 |
7.3 |
7.2 |
|
64 |
HV 130 |
7.0 |
8.0 |
7.3 |
7.0 |
7.2 |
|
65 |
LTP-620 |
7.3 |
7.7 |
6.7 |
7.7 |
7.2 |
|
66 |
Misty (Ba 76-372) |
8.3 |
8.3 |
6.3 |
8.0 |
7.2 |
|
67 |
PST-BO-165 |
7.7 |
8.0 |
6.7 |
7.7 |
7.2 |
|
68 |
America |
7.0 |
8.0 |
7.0 |
7.0 |
7.0 |
|
69 |
Ascot |
7.3 |
8.3 |
7.0 |
7.0 |
7.0 |
|
70 |
Chicago (J-2582) |
7.0 |
7.7 |
7.3 |
6.7 |
7.0 |
|
71 |
Nimbus |
7.7 |
8.3 |
7.0 |
7.0 |
7.0 |
|
72 |
NJ-54 |
7.3 |
7.7 |
7.0 |
7.0 |
7.0 |
|
73 |
Serene (PST-A7-245A) |
7.3 |
8.3 |
6.3 |
7.7 |
7.0 |
|
74 |
VB 16015 |
7.3 |
7.7 |
7.0 |
7.0 |
7.0 |
|
75 |
Bluechip (MED-1991) |
7.0 |
8.0 |
7.0 |
6.7 |
6.8 |
|
76 |
Classic |
6.7 |
8.0 |
6.0 |
7.7 |
6.8 |
|
77 |
Eclipse |
6.7 |
8.0 |
6.3 |
7.3 |
6.8 |
|
78 |
Jefferson |
7.0 |
7.7 |
6.0 |
7.7 |
6.8 |
|
79 |
LKB-95 |
7.0 |
8.0 |
6.0 |
7.7 |
6.8 |
|
80 |
NJ-GD |
7.0 |
8.0 |
6.3 |
7.3 |
6.8 |
|
81 |
Princeton 105 |
7.3 |
7.3 |
6.0 |
7.7 |
6.8 |
|
82 |
Bariris (BAR VB 5649) |
7.0 |
8.3 |
7.0 |
6.3 |
6.7 |
|
83 |
Baron |
6.7 |
8.0 |
7.0 |
6.3 |
6.7 |
|
84 |
Baruzo |
6.7 |
7.7 |
6.7 |
6.7 |
6.7 |
|
85 |
Blackstone (PST-638) |
6.0 |
8.3 |
8.0 |
5.3 |
6.7 |
|
86 |
Envicta (Ba 75-173) |
6.7 |
7.3 |
6.7 |
6.7 |
6.7 |
|
87 |
SRX 2205 |
7.0 |
7.3 |
7.0 |
6.3 |
6.7 |
|
88 |
Caliber |
6.3 |
7.0 |
6.3 |
6.7 |
6.5 |
|
89 |
Cardiff |
7.0 |
7.3 |
7.0 |
6.0 |
6.5 |
|
90 |
Coventry |
6.7 |
8.0 |
7.0 |
6.0 |
6.5 |
|
91 |
Marquis |
6.7 |
8.0 |
7.0 |
6.0 |
6.5 |
|
92 |
Raven |
6.7 |
7.3 |
7.7 |
5.3 |
6.5 |
|
93 |
BAR VB 233 |
6.7 |
8.0 |
7.3 |
5.3 |
6.3 |
|
94 |
HV 242 |
7.0 |
8.0 |
6.3 |
6.3 |
6.3 |
|
95 |
J-1555 |
6.0 |
8.0 |
6.7 |
6.0 |
6.3 |
|
96 |
Kenblue |
6.3 |
7.0 |
6.3 |
6.3 |
6.3 |
|
97 |
Shamrock |
7.0 |
7.7 |
6.3 |
6.3 |
6.3 |
|
98 |
Allure |
5.3 |
7.7 |
7.3 |
5.0 |
6.2 |
|
99 |
Compact |
6.3 |
7.7 |
6.7 |
5.7 |
6.2 |
|
100 |
MED-1580 |
5.0 |
7.7 |
7.0 |
5.0 |
6.0 |
|
101 |
Limousine |
6.3 |
8.0 |
7.0 |
4.7 |
5.8 |
|
102 |
Platini |
6.0 |
8.0 |
5.7 |
5.3 |
5.5 |
|
103 |
ZPS-309 |
4.7 |
8.0 |
6.0 |
4.0 |
5.0 |
|
LSD0.05 |
2.7 |
1.4 |
1.1 |
2.8 |
1.6 |
|
1
Visual quality was assessed using a scale of 9 to 1 with 9 = best quality, 6 = lowest acceptable quality, and 1 = worst quality.2
Genetic color (Gcol) was rated using a 9 to 1 scale with 9 = dark and 1 = light green. Leaf texture (Leaf) was assessed with a 9 to 1 scale with 9 = fine and 1 = coarse texture.
Table 2. Establishment year percentage turf coverage1 data for the 2000 NTEP High-maintenance Kentucky Bluegrass Trial.
|
Cultivar |
% turf cover |
|
|
1 |
Midnight |
53.3 |
|
2 |
Baron |
60.0 |
|
3 |
Lily |
66.7 |
|
4 |
Limerick |
60.0 |
|
5 |
Bodacious |
50.0 |
|
6 |
Bedazzled |
56.7 |
|
7 |
Boomerang |
56.7 |
|
8 |
Eagleton |
66.7 |
|
9 |
HV 140 |
63.3 |
|
10 |
Pp H 6370 |
53.3 |
|
11 |
Pp H 6366 |
56.7 |
|
12 |
Pp H 7929 |
53.3 |
|
13 |
Pp H 7832 |
50.0 |
|
14 |
Pp H 7097 |
53.3 |
|
15 |
A96-402 |
60.0 |
|
16 |
A97-1336 |
60.0 |
|
17 |
Shamrock |
56.7 |
|
18 |
Wellington |
60.0 |
|
19 |
Wildwood |
70.0 |
|
20 |
Hallmark |
70.0 |
|
21 |
A93-200 |
60.0 |
|
22 |
H94-293 |
56.7 |
|
23 |
Coventry |
60.0 |
|
24 |
PST-1701 |
56.7 |
|
25 |
PST-B5-125 |
63.3 |
|
26 |
PST-604 |
60.0 |
|
27 |
PST-108-79 |
53.3 |
|
28 |
PST-1QG-27 |
66.7 |
|
29 |
PST-161 |
53.3 |
|
30 |
PST-B5-89 |
53.3 |
|
31 |
Brilliant |
60.0 |
|
32 |
PST-222 |
50.0 |
|
33 |
A98-739 |
53.3 |
|
34 |
PST-York Harbor 4 |
63.3 |
|
35 |
PST-1BMY |
66.7 |
|
36 |
A97-1439 |
63.3 |
|
37 |
A97-1449 |
60.0 |
|
38 |
Apollo |
66.7 |
|
39 |
A97-1432 |
60.0 |
|
40 |
HV 238 |
53.3 |
|
41 |
Pick-232 |
60.0 |
|
42 |
A97-1567 |
66.7 |
|
43 |
PST-1804 |
63.3 |
|
44 |
B3-185 |
53.3 |
|
45 |
B5-43 |
56.7 |
|
46 |
B5-45 |
46.7 |
|
47 |
IB7-308 |
40.0 |
|
48 |
H92-203 |
50.0 |
|
49 |
B3-171 |
56.7 |
|
50 |
B5-144 |
50.0 |
|
51 |
PST-B4-246 |
53.3 |
|
52 |
PST-H6-150 |
53.3 |
|
53 |
Alpine |
53.3 |
|
54 |
Pick 453 |
63.3 |
|
55 |
Pick 417 |
53.3 |
|
56 |
Limousine |
63.3 |
|
57 |
Quantum Leap |
50.0 |
|
58 |
Envicta |
66.7 |
|
59 |
Goldrush |
63.3 |
|
60 |
Misty |
63.3 |
|
61 |
Ascot |
53.3 |
|
62 |
BH 00-6002 |
56.7 |
|
63 |
Fairfax |
53.3 |
|
64 |
Abbey |
63.3 |
|
65 |
BH 00-6003 |
46.7 |
|
66 |
Ba81-058 |
66.7 |
|
67 |
Raven |
70.0 |
|
68 |
Ba83-113 |
50.0 |
|
69 |
Marquis |
60.0 |
|
70 |
Ba 84-140 |
56.7 |
|
71 |
Ba 82-288 |
60.0 |
|
72 |
Chateau |
46.7 |
|
73 |
Ba 00-6001 |
46.7 |
|
74 |
CVB-20631 |
46.7 |
|
75 |
Chelsea |
56.7 |
|
76 |
A97-1409 |
63.3 |
|
77 |
A96-451 |
56.7 |
|
78 |
Julius |
56.7 |
|
79 |
Allure |
50.0 |
|
80 |
A97-1330 |
66.7 |
|
81 |
H92-558 |
66.7 |
|
82 |
Julia |
63.3 |
|
83 |
Brooklawn |
53.3 |
|
84 |
Boutique |
63.3 |
|
85 |
NA-K991 |
46.7 |
|
86 |
NA-K992 |
56.7 |
|
87 |
Showcase |
56.7 |
|
88 |
Arcadia |
56.7 |
|
89 |
SRX 2394 |
60.0 |
|
90 |
SRX 26351 |
56.7 |
|
91 |
SRX 27921 |
53.3 |
|
92 |
Sonoma |
53.3 |
|
93 |
Bordeaux |
53.3 |
|
94 |
Cabernet |
60.0 |
|
95 |
Champagne |
56.7 |
|
96 |
A96-427 |
60.0 |
|
97 |
A97-1715 |
63.3 |
|
98 |
Jewel |
56.7 |
|
99 |
Unknown |
56.7 |
|
100 |
Blue Knight |
53.3 |
|
101 |
DLF 76-9032 |
53.3 |
|
102 |
DLF 76-9034 |
50.0 |
|
103 |
DLF 76-9036 |
60.0 |
|
104 |
DLF 76-9037 |
63.3 |
|
105 |
SI A96-386 |
53.3 |
|
106 |
SRX 2114 |
60.0 |
|
107 |
SRX 2284 |
60.0 |
|
108 |
Pro Seeds-453 |
53.3 |
|
109 |
SRX OG245 |
56.7 |
|
110 |
99AN-53 |
66.7 |
|
111 |
A98-881 |
56.7 |
|
112 |
Jefferson |
63.3 |
|
113 |
A98-407 |
43.3 |
|
114 |
A98-1028 |
50.0 |
|
115 |
A98-183 |
50.0 |
|
116 |
A98-1275 |
46.7 |
|
117 |
A98-296 |
66.7 |
|
118 |
A98-304 |
60.0 |
|
119 |
A98-139 |
66.7 |
|
120 |
A98-365 |
46.7 |
|
121 |
Kenblue |
70.0 |
|
122 |
Princeton 105 |
60.0 |
|
123 |
Impact |
63.3 |
|
124 |
Total Eclipse |
56.7 |
|
125 |
Odyssey |
56.7 |
|
126 |
Chicago II |
53.3 |
|
127 |
NuGlade |
56.7 |
|
128 |
J-1515 |
53.3 |
|
129 |
J-2487 |
56.7 |
|
130 |
J-1368 |
66.7 |
|
131 |
J-1838 |
56.7 |
|
132 |
J-2561 |
53.3 |
|
133 |
J-2885 |
50.0 |
|
134 |
J-1513 |
50.0 |
|
135 |
Everest |
53.3 |
|
136 |
J-1420 |
50.0 |
|
137 |
J-1648 |
56.7 |
|
138 |
J-2890 |
50.0 |
|
139 |
Everglade |
56.7 |
|
140 |
J-2695 |
56.7 |
|
141 |
J-1665 |
56.7 |
|
142 |
J-1880 |
56.7 |
|
143 |
Rugby II |
53.3 |
|
144 |
Award |
56.7 |
|
145 |
Rambo |
60.0 |
|
146 |
Freedom II |
53.3 |
|
147 |
Liberator |
63.3 |
|
148 |
GO-9LM9 |
66.7 |
|
149 |
Pick 113-3 |
60.0 |
|
150 |
Langara |
63.3 |
|
151 |
A96-739 |
60.0 |
|
152 |
PST-H5-35 |
60.0 |
|
153 |
PST-B3-170 |
56.7 |
|
154 |
B4-128A |
60.0 |
|
155 |
PST-731 |
56.7 |
|
156 |
Washington |
76.7 |
|
157 |
A96-742 |
46.7 |
|
158 |
A97-857 |
56.7 |
|
159 |
BAR Pp 0468 |
53.3 |
|
160 |
BAR Pp 0471 |
53.3 |
|
161 |
BAR Pp 0566 |
60.0 |
|
162 |
BAR Pp 0573 |
63.3 |
|
163 |
Bartitia |
66.7 |
|
164 |
Baritone |
66.7 |
|
165 |
Bariris |
60.0 |
|
166 |
Barzan |
43.3 |
|
167 |
Baronie |
73.3 |
|
168 |
Unique |
60.0 |
|
169 |
Serene |
70.0 |
|
170 |
Moonlight |
60.0 |
|
171 |
Blackstone |
63.3 |
|
172 |
Rita |
70.0 |
|
173 |
Northstar |
60.0 |
|
LSD0.05 |
13.6 |
These data represent the percentage area covered by turf in October, 2000.