Fall is a good time to control perennial and winter annual weeds, but spraying immediately after harvest may not provide the best results. Perennial weeds cut off at harvest need time to accumulate new leaf tissue to absorb herbicides. Four weeks is a minimum recommendation and six weeks is ideal…
Weeds
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Canola is sensitive to carryover from many herbicides. Here’s the list of products that could be used this fall on fields planned for canola next spring, but read the notes carefully…
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Glyphosate is registered for pre-harvest perennial weed control in canola. Glyphosate is to be applied when the majority of seeds are yellow to brown in colour and seed moisture is less than 30%. Heat fits between glyphosate and Reglone on the speed of dry down spectrum. Reglone is a contact herbicide (only kills what it contacts) and is registered in…
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Second applications applied late can reduce profitability it two ways: A competitive crop growing ahead of the weeds may not need a second application. A late application can cause a surprising level of hidden damage to canola plants, setting back yield potential…
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Spraying late or at higher-than-label rates can reduce canola profits…