| Potato Leafhopper Resistant Trial | ||||||||
| Total | Total | Total | Total | Total | Relative Yield |
Weevila | Injuryb | |
| Variety | 2001 | 2000 | 1999 | 1998 | 1999-01 | 99-01 | 5/10/01 | 08/06/01 |
| Commercial Seed: | ------- Tons Dry Matter/Acre ------- | % mean | ||||||
| 5454 | 5.73 | 6.36 | 7.62 | 2.31 | 19.71 | 104 | 152 | 3.6 |
| DK131HG | 5.35 | 6.10 | 7.76 | 2.84 | 19.22 | 102 | 62 | 2.9 |
| 53V63 | 5.41 | 5.83 | 7.87 | 2.88 | 19.10 | 101 | 75 | 2.6 |
| Cleansweep | 5.20 | 6.34 | 7.42 | 2.53 | 18.95 | 100 | 107 | 3.0 |
| 54H69 | 5.62 | 5.57 | 7.58 | 2.87 | 18.77 | 99 | 87 | 2.9 |
| DK121HG | 5.01 | 5.81 | 7.41 | 2.65 | 18.23 | 97 | 93 | 2.8 |
| Defense+EV | 4.72 | 5.57 | 7.79 | 2.65 | 18.07 | 96 | 62 | 3.1 |
| AmeriGuard302+Z | 4.94 | 5.52 | 7.42 | 2.39 | 17.87 | 95 | 97 | 3.5 |
| Experimental Seed: | ------- Tons Dry Matter/Acre ------- | % mean | ||||||
| 4A52* | 6.13 | 6.27 | 7.98 | 3.13 | 20.38 | 108 | 71 | 2.6 |
| 4A51* | 5.87 | 6.20 | 8.15 | 3.29 | 20.22 | 107 | 85 | 2.6 |
| 4A62* | 5.91 | 6.07 | 7.92 | 3.36 | 19.89 | 105 | 79 | 2.0 |
| 3A14* | 5.98 | 6.13 | 7.72 | 3.28 | 19.83 | 105 | 86 | 1.8 |
| 3R22* | 5.50 | 6.22 | 7.86 | 2.85 | 19.57 | 104 | 96 | 2.7 |
| CW72000* | 5.30 | 5.72 | 8.05 | 2.77 | 19.07 | 101 | 79 | 2.8 |
| 3A10* | 5.50 | 5.67 | 7.62 | 3.10 | 18.79 | 100 | 73 | 3.1 |
| 98-1X* | 4.87 | 6.02 | 7.80 | 2.44 | 18.70 | 99 | 104 | 2.9 |
| ZH9746H* | 5.05 | 5.83 | 7.65 | 2.41 | 18.53 | 98 | 99 | 3.2 |
| CW6246* | 4.98 | 5.66 | 7.07 | 2.87 | 17.71 | 94 | 82 | 2.6 |
| PLH 40 | 4.65 | 5.51 | 7.34 | 2.54 | 17.50 | 93 | 72 | 2.6 |
| 98-2X* | 4.70 | 5.38 | 7.41 | 2.42 | 17.49 | 93 | 84 | 2.7 |
| Mean | 5.32 | 5.89 | 7.67 | 2.78 | 18.88 | -- | 87 | 2.8 |
| LSD 0.05 | 0.42 | 0.42 | 0.49 | 0.24 | 0.95 | -- | ns | 0.7 |
| CV % | 5.60 | 5.00 | 4.50 | 6.20 | 3.60 | -- | 34 | 17.9 |
| no. of harvests | 4.00 | 4.00 | 4.00 | 2.00 | 12.00 | -- | -- | -- |
| * Variety tested using experimental seed that may not give performance identical to that of commercially available seed. | ||||||||
| Data subjected to Nearest Neighbor AOV, adjusted means reported. | ||||||||
| a Number of potato leafhoppers/5 sweeps
b Potato leafhopper injury rated from 1= least 5 = most severe injury | ||||||||
| Establishment: | Seeded with a Hege 3-point hitch drill with presswheels at 16 lb/a. Eptam applied PPI at 2Qt/a. | |||||||
| Plot size: | 4' x 20', 15' alleys and borders, RCBD with four reps. | |||||||
| Soil type and analysis: | Crosby silt loam, pH = 6.61, P = 26 lb/a, K = 230 lb/a, CEC = 9, O.M. = 2.7 (11/00). | |||||||
| 2001 Fertilization: | 350 lb/a of 0-46-0 and 500 lb/a of 0-0-60 applied after first cut. | |||||||
| 2001 Pest control: | No insecticide applied. Herbicide applied 15-March. | |||||||