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)