• Issues of the week June 16, 2010 — Spraying delays due to wet fields, rain and wind have made for a “super weedy year.” Prepare to spray twice and use rates appropriate to the weed size. Cutworm spraying is reported all across the Prairies, and the threat will continue for another week at least…
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  • Timing needs to be right for both the weeds and the insect. Presently there are no insecticide tank mixes registered for glyphosate, Liberty or Odyssey for applications in canola. Recent PMRA guidelines advise that any tank mixing products that are registered for use in canola is acceptable — even if the tank mix itself isn’t……
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  • 1. Missing a window of opportunity (due to moisture or any other reason) with herbicides, fungicides or insecticides often results in greater yield losses because the pests will have had a chance to cause damage, or are tougher to control later. Research in western Canada has shown over and over that removing weeds earlier significantly……
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  • When fields are too wet for the sprayer, canola growers do have options for aerial application. —Roundup WeatherMax is the only glyphosate registered for aerial application at this crop stage. All conditions are outlined in detail on the label. —Liberty (glufosinate) is registered for aerial application at this stage. Remember, Liberty works best at higher……
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  • We have received a few questions about Liberty and whether to use the high rate of Liberty alone or apply a lower rate and tank mix with clethodim for improved wild oat control. Eric Johnson, weed biologist with AAFC in Scott, Sask., says, “I don’t think that there is rate of Liberty that would provide……
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  • Weed growth will resume quickly when conditions get warm and the rains stop. Then it will be at least a day or two after that before fields are dry enough to drive on and before crop stressed by frost or excess moisture recover enough to allow good tolerance of herbicide. That means bigger weeds to……
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  • With high emergence rates of volunteer canola, some growers with many acres still to seed may be tempted to leave these volunteer “crops” to maturity. Volunteer canola is not a hybrid anymore, so yield potential of each individual seed is lower and not all plants will have herbicide tolerance. And with distribution concentrated in the……
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  • Liberty works best when applied with water volumes of 10 gallons per acre and when temperatures are warm. “When I worked in retail, we eliminated almost all Liberty performance issues by going to 10 gpa (Imperial),” says Ingrid Kristjanson, crop specialist for Manitoba Agriculture, Food and Rural Initiatives. Clark Brenzil, weed management specialist with Saskatchewan……
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