May 18, 2016 – Issue 9

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  • Frost: Canola’s resilience may surprise you

    May seeded plots show evidence of frost damage but the surviving plant population is still very good.

    Canola seedlings at the canolaPALOOZA site in Lacombe, Alberta, were hit by three -4°C frosts and one -3°C frost over a five-night period May 10-14. Yet photos taken the morning of May 16 show that a decent number of seedlings survived.


  • Scouting: The critical first 21 days

    The seedling on the left has wirestem.

    The week after seeding is a good time to verify seeding depth and to check seeds and seedlings for rots and blights. Disease damaged seed and seedlings die quickly, and may be gone within a few days, which is why this timing is important to an accurate diagnosis.


  • 8 steps to make the right flea beetle decision

    Fleabeetle_underleaf_BrunoSK_May272015_AmandaWuchner small

    Here is how to make the flea beetle spray decision….


  • Weeds growing strong again

    Pre-seed burnoff gets weeds that will provide early competition to your crop. Credit: Ian Epp

    Growers will be eager to seed with the return of warm weather but early weed control also remains a priority — especially for fields that have not received any yet. Spraying those fields now and seeding three days later will have an economic benefit given that weed competition remains a major factor in crop yield potential.


  • Seeding date and yield — graphs

    Alberta data showing relationship between seeding date and canola yield in the Black Soil Zone. Source site:$department/deptdocs.nsf/all/crop5758

    Seeding early May versus late May or early June, providing that crop conditions allow for it, is a relatively low cost way to increase yield and profit from the crop.


  • Reseeding: The May option

    Yield potential for canola seeded in late May is not as high, generally, as canola seeded in early May, but it is still pretty good and better than for canola seeded in June. Given the current date, the argument in favour of reseeding a crop clearly thinned out and set back by frost or any other issue may have more merit.


Canola Watch