Canola can be damaged by trace herbicide residues left in a sprayer tank. This article underlines the importance of a complete clean out between products, and an understanding of what risks each product and each tank mix presents in terms of scrubbing effect and what may happen to a product or products if left in the tank for an extended…
Weeds
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Rain has set back weed spraying. Early canola crops are near the end of their spray windows, even though some fields have not received a first pass and some fields got a first pass but need a second. Label application windows: Glyphosate: Anytime up to and including the 6-leaf stage of canola. Liberty: Cotyledon stage up to the early bolting…
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If an insect or disease threat is present at economic thresholds and within the weed control window, applying herbicides with other pest control products can add to production efficiency and cost management. Before mixing, make sure all products are compatible. And if they are compatible, they may have strict rules for mixing order…
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Cool cloudy days after cool nights will result in lower herbicide efficacy than applications made in warm sunny days. Cloudy days don’t provide the photosynthetic activity required for many herbicides, including Group 10 glufosinate. And nights near freezing followed by days with highs that barely reach 10 C will not provide high metabolic activity required for best results from Group…
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In-crop weed control should occur as early as possible since canola is much more vulnerable to weed competition prior to reaching complete ground cover. Past research has demonstrated an advantage of 3 bu./ac. for controlling weeds at the 1-2 leaf stage of canola versus 3-4 leaf, and a 7 bu./ac. advantage versus 6-7 leaf. At $12 per bushel, that’s $36…
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No time to wait? Growers who want to do a preseed burnoff and then get seeding may not want to wait 3-4 days for the weeds to recover from a frost. In this situation, growers should recognize that if they go ahead and spray right away, efficacy may be reduced. However, even with the lower efficacy, doing the burnoff and…
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