September 10, 2015 — Issue 25

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  • Dockage, tough stems and combine settings

    Dockage screen elevator

    Three concepts to consider while setting the combine this harvest: (1) Can dockage be too low? (2) Change combine settings based on crop conditions. (3) Frost damaged seed might not be a total write off.


  • Reassess reseeding: Check yield and quality

    Reseeding looked like the right idea in many areas throughout the summer, but the real test is at harvest. If there was no risk of frost and the significant loss of grade and yield that results, we’d have a lot more canola go in after the soils reached 10°C and the spring frost risk was […]


  • Post-swath disease scouting

    Harvest is a great time to assess the incidence and severity of canola diseases, an important step in management for next year. Post-swathing disease scouting is possible but results are not as accurate as pre-swath scouting.


  • Already swathing, then had frost. Can I keep going?

    Yes, keep going. The recommendation to wait at least 4-6 hours after a frost to assess the extent of frost damage only applies to canola that was not quite ready to swath. If you were already swathing or were going to swath a crop that day, there is no benefit to waiting.


  • K release from canola swaths

    A case where potassium washed from canola windrow resulted in clear patterns in the following wheat crop. Source: John Heard

    Have you seen patterns like this? Potassium in swathed crop is mobile and if several rainfall events fall on the swath before combining, potassium will bleed out below the swath. Since a six-foot swath contains all the straw from a 30-foot or wider cut, the K is concentrated. K-loving crops following canola can find sufficient K below the swath, but inadequate between swaths.


  • Wet soil increases clubroot spread

    Moist conditions mean more soil clinging to machinery wheels. This increases the risk of moving clubroot as well as weed seeds and insect pupae around the farm. With the discovery of a potential new clubroot pathotype, growers will want to take time to sanitize equipment between fields.


  • Condition canola immediately after harvest

    Turn on the fans to cool that hot canola.

    Storage risk is reduced significantly when canola moisture is 8% or lower and temperature is 15°C or lower. Turn on the fans to cool that hot canola.


  • Weeds: Wait for post-harvest regrowth

    Narrow-leaved hawk's beard

    Fall is a good time to control perennial and winter annual weeds. The message this week includes two reminders: Wait for post-harvest regrowth. And know the best timing for the weeds present. The photo shows narrow-leaved hawk’s-beard.


Canola Watch