June 1, 2011 – Issue 10

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  • Issues of the week

    With most canola seeded and starting to emerge across the western Prairies, scouting becomes a top priority. This is a canola crop’s most vulnerable stage, and through scouting you can address threats early. Some growers in Manitoba and southeast Saskatchewan are taking desperate measures to seed canola. This includes aerial seeding. Unless you can get […]


  • Crop and weather update

    Peace (B.C. and Alberta): Seeding is 90-95% complete. Emergence is generally good, but some canola seed is stranded in dust and waiting for rain. Flea beetles are all over the region, and some growers have started to spray. Alberta: Seeding is 85-95% complete. Northeast Alberta needs rain while the central and south regions have adequate […]


  • Protect canola at this most fragile stage

    Canola is most fragile during the first 21 days after emergence. The small plants are highly susceptible to flea beetles, cutworms, seedling diseases, weed competition and various other threats. Scouting may be required every day for at-risk crops, especially if a threat such as flea beetles seems to be building. At a minimum get out to each field a couple times per week during this period.


  • Start scouting the day after a frost

    You can often tell the condition of a crop the day after a frost. It may have survived without any damage, in which case you may not have to worry. Or, if most of the plants are black and bent over, it may be clear that serious losses have occurred. But does that mean the field should be reseeded? The answer to that question is rarely so clear the day after a frost — which is why waiting 3-4 days can help.


  • Wild oats going gangbusters

    If wild oats are the one problem weed in a Liberty Link canola field, one option is to apply a grassy weed product (Centurion or Select) alone while waiting for emergence of other weeds prior to the Liberty application. But walk the field and take a close look at the weed spectrum before making this decision to ensure that delaying the Liberty application won’t lead to reduced control of other weeds that are present.


  • Weed control in cool, wet conditions

    In cool cloudy conditions, weed growth is slower and herbicide efficacy may be lower.

    Cool humid conditions are also prime conditions for herbicide injury to the crop. The leaf cuticle (waxy layer) is thinner allowing more rapid uptake of herbicide into the plant and cool conditions reduce the speed at which the herbicide is inactivated in the crop. This can lead to a flash of injury in the crop.


  • Volunteer canola as a crop? High risk, low potential!

    With fields too wet to seed, growers in Manitoba and parts of Saskatchewan may be tempted to leave volunteer canola and harvest it as a crop. There are many reasons to avoid this, and very poor yield potential is just one of them.


  • Harrowing essential after aerial seeding

    After broadcast seeding, including seeding by plane or helicopter, fields must be harrowed to loosen the soil surface and provide seed to soil contact. Canola seed is very light and does not embed into the soil, even if dropped from an airplane at high speed.


  • Do you see sulphur deficiency symptoms?

    Sulphur deficiency can show up as early as the 4-5 leaf stage in fields that are highly deficient. A top up with ammonium sulphate may be required in fields that have not received regular sulphur applications.


Canola Watch