May 15, 2013 – Issue 7

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  • Big cleavers need pre-seed control

    This is an extreme case of runaway early season weeds. These should definitely get a pre-seed burnoff, probably at least a week earlier. Source: Ken Sapsford
    Winter annual cleavers are reported in high numbers in some fields. These need to be sprayed before seeding to prevent them from getting really large and near impossible to control with in-crop label rates. The pre-seed window provides an opportunity to hit these large cleavers with rates needed for control.


  • Issues of the week


    Seeding is nearly complete in some areas of southern Alberta, and canola that is up looks good — although the region could use rain. Meanwhile, seeding will start later this week or next week in many other Prairie regions. The photo is typical of many fields — almost ready to go. Mid to late May is a fine time to seed canola. Yield potential, based on long-term averages, may not be as good as early May seeding, but it’s not far behind. Once they get rolling, growers can seed a lot of acres in a short period of time— weather permitting. Seeding is the most important pass you make over the field, so remain patient and remember you only have one chance to give that seed the best start possible.

    Seed-placed fertilizer reminder: To avoid seedling damage, apply no more than 20 lb./ac. of phosphate with the seed. Put everything else — nitrogen, sulphur, potassium and extra phosphorus — away from the seed.

    While waiting to seed, look at the weed situation. Weeds that are hard to control in crop — such as large winter annual cleavers — need a pre-seed application for adequate control.


  • Canola Watch quiz

    Quiz May 15

    Why is this canola stand so thin?


  • Seed-place ammonium phosphate only

    The bottom line for seed-placed fertilizer in canola:
    1. Apply plant available sources of nutrients.
    2. Place a modest rate of P in the seedrow. At rates over 20 lb./ac., the salt component in MAP, for example, can start to set back seedling survival.
    3. Place N and S in a band away from the seed.


  • Principles of good seed placement

    Growers are still better off seeding 1/2” to 1” deep and waiting for rain rather than trying to chase moisture in fields where the top layer of soil has dried out. The principles of good seed placement still apply. These are…


  • General rules for mixing pesticide

    Always refer to pesticide labels for mixing instructions that may be specific to each product. Here are some general rules for mixing pesticides, taken from the Manitoba Guide to Crop Protection…


  • Insect update: Wireworms, cutworms, south winds

    Wireworms and their adult form, click beetles. Source: Scott Hartley, SMA

    Wireworms have not become the crisis some expected after lindane was pulled from the market, but some fields do have populations at levels that may cause economic loss. Noticeable losses are often confined to small bare patches. Check bare patches to confirm the reason for missing plants. It could be cutworms, wireworms, disease or something else entirely — like Richardson ground squirrels, for example.

    Aster leafhoppers and diamondback moths blow in on south winds, and just today winds from Texas have turned toward Manitoba.


  • Ultimate Canola Challenge — Manitoba

    Here are the team leaders, from left to right: Shawn Cabak with Team CROP, Anastasia Kubinec with Team MAFRI, and Curtis Cavers with Team CCA.

    Final results are in. Which of these three team leaders had the highest profit margin?


  • Ultimate Canola Challenge – Alberta

    Gopher damage to canola leaves. Farming Smarter staff have been trapping gophers at the Lethbridge UCC site to keep damage to a minimum.

    Gophers are the latest threat at the UCC site in Lethbridge. This plant has suffered some feeding damage.


  • Clubroot BMPs for agronomists

    Booties small

    Agronomists and other staff traveling from field to field are encouraged to use the following best management practices (BMPs) to avoid spreading clubroot-infested soil. 1. Park on the road or in a grassed approach. 2. Wear plastic or Tyvek disposable booties over existing footwear. 3. Rubber boots worn without booties must be cleaned before leaving the field.


  • Clubroot Workshop for growers, agronomists, municipal staff

    The International Clubroot Workshop June 19-22 in Edmonton includes one day — Friday, June 21 — dedicated to clubroot extension. This is the day when growers, agronomists, municipal and county staff learn the latest in clubroot management, prevention and mitigation. Cost is $150 per day, and you are welcome to attend the whole workshop, space permitting.


Canola Watch