|
Ohio, South Charleston, Sown 4-13-98
|
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| Variety |
1999 Total
|
1998 Total
|
Relative Yield
1999 |
% Stand
|
Injuryaa
|
|
| Commercial Seed: | Tons Dry Matter/Acre | % mean | 4/14/99 | 6/30/99 | 8/3/99 | |
| DK131HG |
7.76
|
2.84
|
101
|
100
|
1.0
|
1.9
|
| Susceptible Check |
7.62
|
2.31
|
99
|
99
|
2.8
|
4.9
|
| Cleansweep |
7.42
|
2.53
|
97
|
95
|
1.3
|
2.3
|
| DK121HG |
7.41
|
2.65
|
97
|
96
|
2.0
|
3.6
|
| PLH 40 |
7.34
|
2.54
|
96
|
94
|
1.8
|
2.2
|
| Experimental Seed: | ||||||
| 53V63* |
7.87
|
2.88
|
103
|
99
|
1.0
|
1.5
|
| Defense+EV* |
7.79
|
2.65
|
102
|
95
|
2.3
|
3.0
|
| 54H69* |
7.58
|
2.87
|
99
|
95
|
1.0
|
1.5
|
| AmeriGuard302+Z* |
7.42
|
2.39
|
97
|
94
|
2.0
|
2.8
|
| Mean |
7.67
|
2.78
|
--
|
97
|
1.5
|
2.2
|
| LSD 0.05 |
0.49
|
0.24
|
--
|
3
|
0.5
|
0.7
|
| CV % |
4.50
|
6.16
|
--
|
2.33
|
25.51
|
22.35
|
| no. of harvests |
4
|
2
|
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| * Variety tested using experimental seed that may not give performance identical to that of commercially available seed. | ||||||
| a Potato leafhopper injury rated from 1 = least to 9 = most severe injury. | ||||||
| Drill seeded with presswheels at 16 lb/a. Eptam 7E applied PPI at 2 qt/a. | ||||||
| Crosby silt loam, pH = 6.8, P = 45 lb/a, K = 242 lb/a, CEC = 9, O.M. = 2.7 (10/98). | ||||||
| 50 lb/a of P2O5 and 250 lb/a of K2O applied 4-2-99. | ||||||
| No insecticide applied. Potato leafhopper populations exceeded economic action thresholds during the 2nd, 3rd and 4th growth cycles | ||||||