Home / Canola Watch / Weeds / Page 31
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Cold temperatures help trigger winter annuals, such as cleavers (shown), and perennials to start moving food reserves down into below ground tissues, so waiting until after the cooler weather can improve weed control. But make sure weeds are actively growing with new supple leaf area to target, and that the actual spray day is warm…
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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%. If desiccation for direct harvesting is the primary goal then a true desiccant — Reglone — may be a better option…
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Growers who usually spray twice may not need to spray a second time this year if the canopy has closed, weeds are behind the crop, and the recommended application window is past. If the opposite is true, growers have to decide whether weed competition costs exceed potential yield loss…
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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. Roundup WeatherMax is the only glyphosate registered for aerial application at this crop stage. Liberty (glufosinate) is registered for aerial application at this stage, as is…
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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…
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To reduce drift, use coarse sprays and apply at lower pressure, spray with at least some wind (calm is bad), slow down, consider shrouds, and keep the boom low…
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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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LL: Use high water volumes for Liberty and use the Group 1 tank mix. RR: Use the 180 ae rate of glyphosate if you plant to hit grassy weeds first and follow up later. CL: Consider Odyssey DLX for enhanced grassy weed control in Clearfield canola…
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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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