Objective:
To provide growers in Northwestern Montana with reliable, unbiased, and up-to-date data on how current and future winter canola varieties perform in this region. The data should help producers in the region select the varieties that are best for their area.
Personnel:
D. Larson, R. Whitehead, J. Zimmerly, Z. Sippel, E. McGarvey, R. Arakaki, M. Stamm, J. Jensen
Summary:
25 entries of winter canola, in three repetitions, were planted on 18 August, 2024 and harvested on 3 September, 2025. The trial was rainfed, receiving 11.9 inches of rain during that period. Cultural practices can be found in table 1.
Mean yield was 18.1 Bu/A with DK EXSTAR having the highest (28 Bu/A) and CP1022WC the lowest (8 Bu/A). Mean test weight was 46 Lbs./Bu with TFW115D having the highest (50 Lbs./Bu) and CP1022WC having the lowest (15 Lbs./Bu). Mean oil was 27% with Janosh having the highest (44%) and KSR4854S the lowest (14%). Mean winter survival was 75% with CP1077WC having the highest (100%) and Surefire having the lowest (54%). Mean shatter was 7% with Surefire having the highest (19%) and DK EXSUN, DK SEAX, DK EXSTAR, TFW115D, and CP320WRR, the lowest (0%). Mean bloom date was day 132; 12 May, with TFW115D having the earliest (day 128; 8 May) and CP1022WC having the latest (day 136; 16 May).
Table 1. Management Information
| Seeding date: | 18 Sep. 2024 | Field Location: | R7 |
| (262) | Harvest date: | 3 Sept. 2025 | |
| Seeding rate: | N/A | (246) | |
| Previous crop: | Barley | Soil type: | Creston Silt Loam |
| Herbicide: | Gatlin + | Tillage: | Conventional |
| Woodside | |||
| Insecticide: | N/A | Soil Residual nutrient | |
| (N, P, K Lbs./A): | 55.5-18-110 | ||
| Fungicide: | N/A | Nutrient Fertilizer Applied | |
| (N, P, K Lbs./A): | 140-0-0 |
Table 2. Agronomic Performance
| NAME | WINSUR | FLWR | PM | SHTTR | TWT | OIL | YLD |
| (%) | (Days) | (Days) | (%) | (Lbs./Bu) | (%) | (Bu/A) | |
| CP1022WC | 78.7 | 136 | 204 | 11.7 | 15.3 | 0.0 | 8.4 |
| CP1066WC | 79.6 | 134 | 200 | 12.7 | 47.6 | 13.9 | 11.3 |
| CP1077WC | 99.5* | 129 | 199 | 1.7 | 47.5 | 43.6 | 23.7 |
| CP225WRR | 60.1 | 134 | 199 | 16.7 | 31.7 | 27.5 | 14.9 |
| CP320WRR | 54.3 | 134 | 202 | 0.0 | 48.3 | 0.0 | 12.3 |
| CP380WRR | 59.4 | 134 | 203 | 12.0 | 47.8 | 14.0 | 12.6 |
| DK EXCEPTION | 65.2 | 133 | 202 | 0.3 | 46.0 | 27.9 | 19.6 |
| DK EXIMA | 88.4 | 129 | 200 | 3.0 | 48.3 | 40.7 | 21.7 |
| DK EXSTAR | 83.2 | 130 | 198 | 0.0 | 47.9 | 43.1 | 28.2* |
| DK EXSUN | 91.1 | 131 | 206 | 0.0 | 48.7 | 41.6 | 20.0 |
| DK SEAX | 89.9 | 132 | 201 | 0.0 | 49.2 | 40.6 | 19.2 |
| DK SEPHOR | 69.6 | 131 | 204 | 3.3 | 47.7 | 28.1 | 19.5 |
| DK SEQUEL | 75.6 | 130 | 199 | 1.7 | 48.9 | 42.3 | 19.0 |
| DK SEVERNYI | 74.2 | 133 | 201 | 10.0 | 48.6 | 28.4 | 20.0 |
| Drifter | 89.3 | 130 | 199 | 6.7 | 48.2 | 14.9 | 16.5 |
| Janosh | 83.0 | 130 | 202 | 3.3 | 48.8 | 43.9* | 21.6 |
| KS4662 | 70.0 | 133 | 200 | 15.0 | 48.1 | 28.0 | 16.0 |
| KS4737 | 62.2 | 131 | 200 | 8.7 | 47.2 | 14.5 | 21.6 |
| KSR4854S | 57.1 | 134 | 201 | 8.3 | 46.7 | 13.8 | 12.7 |
| Manhattan | 83.0 | 133 | 201 | 6.7 | 46.2 | 14.1 | 15.5 |
| Star 930W | 80.6 | 133 | 201 | 9.0 | 47.6 | 28.0 | 12.9 |
| Surefire | 54.1 | 131 | 198 | 19.0* | 48.2 | 28.4 | 22.0 |
| TFW115D | 77.1 | 128* | 197* | 0.0 | 49.5* | 43.2 | 25.3 |
| Torrington | 72.2 | 133 | 201 | 11.3 | 46.0 | 13.9 | 11.9 |
| Triathlon | 88.4 | 133 | 198 | 3.3 | 48.4 | 43.1 | 25.2 |
| Mean | 75.4 | 132.0 | 200.6 | 6.6 | 45.9 | 27.1 | 18.1 |
| CV (%) | 28.0 | 1.1 | 1.4 | 120.5 | 16.6 | 65.7 | 40.8 |
| P-value | 0.3 | >0.001 | 0.05 | 0.08 | >0.001 | 0.03 | 0.14 |
| MSD | 66.9 | 4.5 | 8.9 | 25.1 | 24.2 | 56.4 | 23.3 |
| Bold*= Highest value or earliest date in column, Bold= Statistically equal to highest or earliest value in column, WINSUR= Winter Survival (%), FLWR= Flower Date (days),SHTTR= Shatter (%), Pro= Protein (%), TWT= test weight (Lbs./Bu), OIL= Oil content (%), YLD= Yield (Bu/A) | |||||||
