July 3, 2014 – Issue 13

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  • Four the week

    Crop stages from crop to crop is highly variable, and is just one of many reasons why neighbouring crops can't be treated the same.

    Life raft. Before you feed a drowning canola crop, check its vitals. You want to make sure it’s on the road to recovery before laying out a fertilizer feast.

    Rot risk. Moisture is the number one risk factor for sclerotinia stem rot, and most areas have moisture. Moisture in the two weeks before flowering increases apothecia emergence.

    To each its own. The needs of one crop can be completely different from the one right across the road. What pays for one does not necessarily pay for the other.

    The Bee in BMP. Think about your friendly neighbourhood pollinators before applying insecticide on flowering crops. You can protect both.


  • Map of the week

    precip 2014
    Legend for precipitation maps

    This is one of five maps for this week, showing growing season precipitation to early July for 2014, 2013 and 2012, along with maps showing sclerotinia stem rot incidence in Saskatchewan. Do you see the correlation?


  • July 3 Quiz

    apothecia cropped Dokken-Bouchard small

    We have three “what is this?” type questions to test your agronomy eye. The answer key, which you’ll see after completing the quiz, provides agronomy tips to go along with each question.


  • Moisture elevates sclerotinia stem rot risk

    With ample moisture evident in this canopy, these petals fallen near the main stem will likely lead to sclerotinia infection unless they've been sprayed.

    Earliest canola fields are coming into flower, and many areas of the Prairies have more than enough moisture to elevate the sclerotinia stem rot risk. Here are key risk reminders as we head into sclerotinia stem rot management season….


  • Waterlogging and canola

    Canola can handle about three days like this before plants start to die.

    What happens to canola plants that are underwater for a few days? Here’s a detailed explanation from Murray Hartman, oilseed specialist with Alberta Agriculture and Rural Development….


  • Top dress — yes or no?

    Sulphur deficiency symptoms include cupping and purpling of leaves, but soil tests and a knowledge of cropping history will help to confirm.

    Two potential top dress situations are showing up in canola fields across the Prairies this week:

    1. Excess moisture and poor nutrient availability.
    2. Crop runs out of nutrients.


  • Manage each field for its own conditions

    Crop stages from crop to crop is highly variable, and is just one of many reasons why neighbouring crops can't be treated the same.

    Canola crops side by side can have different risk factors, and often do not require the same crop management for nutrients, weeds, insects and disease. Crop rotation, fertilizer rates, plant population, stand uniformity and crop stage are a few factors that can influence whether one crop needs a treatment while the other right beside may not.


  • Bee BMPs

    Source: John Gavloski, MAFRI

    Here are best management practices to be friendly with bees and beekeepers….


  • Hold off on lygus at the bud stage

    Lygus on bud, Erin Brock_opt

    Insecticide to control lygus present at the bud stage of canola is rarely effective or economical, and there is no threshold for this stage. Under good growing conditions, canola can grow through this early damage without any yield loss. In fact, lygus studies show that light early feeding on healthy canola crops can actually increase flowers and pods and, ultimately, yield.


Canola Watch