Home / Canola Watch / Weeds / Page 27
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Research shows that a pre-seed burnoff will result in higher yields versus no pre-seed burnoff. Walk fields to see what weeds are present and how fast they’re advancing. Seeding can begin fairly soon after a burnoff…
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Crop diagnostics often come down to good photography skills, especially since so many people have smart phones with cameras, and since agronomists cannot get to all fields in a timely manner. The rules to agronomy by phone and photograph are…
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The onset of lower temperatures and shortened days in the fall trigger perennials such as Canada thistle, dandelion and quack grass to start moving sugars to below-ground tissues. Winter annuals and biennial are also doing this, but they don’t need a temperature trigger. Spraying these weeds in fall takes advantage of this downward flow into the below ground buds on…
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1. Cleavers. Cleavers used to be pretty much an annual weed, but with more direct seeding it’s becoming more of a winter annual. The rise in winter annual cleavers may be a case of producers not applying high enough rates in the spring to manage them. Grading tolerances are fairly low for cleavers, and the weed seems to be getting…
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Ideal timing for a fall herbicide application should depend on the weeds present in the field. Perennials, like Canada thistle (shown), are best controlled in September, especially when using glyphosate. October is the best time to control winter annuals such as narrow-leaved hawk’s beard, stork’s bill, sow thistle and cleavers…
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Growers planning post harvest weed control to clean up fields planned for canola in 2014, take these steps for improved control and to avoid herbicide carryover damage in canola…
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Canola binned hot, even if it has low moisture, low dockage and low green, should still be put on aeration. This will even out the temperature throughout the bin, and help remove some of the moisture from respiring seed. Even at low moisture, air movements within the bin could concentrate this moisture…
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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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Again this year, canola crops with blanks or missing pods on the main stem are being found. Typically, a missing pod can result from any stress on the plant because stress inhibits proper fertilization of the flowers. It is important however, to accurately determine the cause of the stress in order to take steps to reduce its impact on future…