Home / Canola Watch / Weeds / Page 25
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Seeing stems with lots of blanks where pods should be is often cause for alarm. There are many possible factors. Here are the top 6:…
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When strange patterns of damage in canola fields line up perfectly with the sprayer boom width or follow typical drift patterns, phone calls and finger pointing begin. Explanations can be simple: The wrong product was added to the tank, or the right product was applied but on the wrong field. But situations are often much more complicated — and made…
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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…
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Late weed control significantly increases the yield loss from weed competition, and it can also damage canola plants. However, the yield and economic risks from a later in-crop spray could make sense... —If growers use canola as a clean up crop for Group-1 resistant wild oats, narrow-leaved hawk’s beard, round-leaved mallow and other tough weeds, a second herbicide application may…
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If weeds and crop are advancing toward the end of the application window and the ground is too soft and wet to support a sprayer, then aerial spraying may be the best economic response. Here are the options for aerial herbicide application in canola…
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Many fields were seeded in odd shapes because low spots could not be reached. Growers have a challenge to manage the weeds in these patches. Options include…
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Growers who usually spray twice may not need that second pass this year if the canopy has closed, weeds are behind the crop, and the recommended application window is past. The crop should outcompete the weeds all on its own, and the economic benefit of the second herbicide application just won’t be there. But if the crop looks like the…
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The longer a herbicide sits in a sprayer, the greater the risk that it is going to hang up in the tank. Sprayers should be cleaned at the end of every work day regardless if the same product or tank mix is being sprayed the following day…
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Early mornings and evenings when conditions can be the best for spraying can also be the worst because of possible air temperature inversions. Air temperature inversions — when air temperatures actually increase as you get higher above the ground — create ideal conditions for tiny spray droplets to become suspended in the air and drift considerable distance from their target…