May 28, 2014 – Issue 8

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  • Four the week

    Dandelion spring stubble small

    Avoid top dress mess. Top dressing N might get the crop seeded faster, but check timing and technique. Good weed management and top dress fertilizer don’t always mix.

    Quack attack. Quack grass and dandelions are two early weeds that can have a big impact on yield potential. Contain them.

    Crop insurance cut off. Canola seeded in early June still has reasonable yield potential, and crop insurance deadlines for Manitoba and Eastern Saskatchewan comply.

    A sweet relationship. The Canola Council of Canada has four new videos to show the positive relationships between canola growers and beekeepers and between canola and bees.


  • Map of the week

    NDVI May25 14:13
    NDVI legend

    This map shows the difference in Normalized Difference Vegetation Index (NDVI) at 1-kilometer resolution as of May 19 to 25, 2014 compared to the same period in 2013. Yellow areas are similar to last year, light brown areas are slightly behind.


  • May 28 Quiz

    The questions for this week:

    1. Flea beetles have been feeding on these cotyledons. What percentage of these leaves are considered defoliated?
    2. Cutworm damage tends to be in patches. But lots of damage can occur in patches, including herbicide carryover, seedling diseases, so scouting is essential. What is the best way to scout for cutworms?
    3. Why is this insect special?


  • Top dress timing


    Top dressing fertilizer usually occurs after emergence, often as a response to increased yield potential or as a remedy for noticeable deficiency symptoms.

    However, growers are looking at top dressing this year as a logistical aid in getting the crop seeded faster. Here are some agronomy messages to help in your decision making.


  • Top-dress lessons from fertigation studies

    In an Alberta study, fertigation was put on at three different stages — 5-leaf, bolting, and flowering — and then compared to plots where all nitrogen was applied at the time of seeding. The study has only one year of results, and so far they show that with canola, fertigation is — at best — equal to the treatment that received all nitrogen at the time of seeding.


  • Biggest loss from weeds emerging before canola

    If a burnoff didn’t get done or missed key yield robbing early season weeds such as quackgrass and dandelion, then control has to be early in crop to prevent significant yield loss. For quackgrass in particular, in crop control may require a tank mix with good activity on grasses.


  • Crop insurance deadlines for canola

    Manitoba and eastern Saskatchewan, in general, have a lower percentage of canola seeded than other parts of the prairie. Canola seeded June 5 or even June 10 in those regions can still produce a good crop, and crop insurance deadlines reflect that. Here are the deadlines…


  • Bees and canola: A sweet relationship

    Bee video_ Sweet relationship

    The Canola Council of Canada has produced four videos showing how beekeepers and canola growers can work together. Click the image above to see the video called “Canola and Bees: A sweet relationship.”


Canola Watch