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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…
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How do you spray weeds in a timely fashion when every day seems too windy? Too windy, according to the Guide to Crop Protection, is wind above 15 km/h. But we know that some operators will go with winds of 20 km/h and maybe a bit above. Here are tips to improve performance and limit the drift risk in wind…
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Applications made when cool cloudy days follow cool nights will result in lower or slower 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…
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Weeds are coming up strong. As part of the Canola Council of Canada’s Keep It Clean campaign, we remind growers to use only registered pesticides when required. Refer to product labels for proper use instructions. Here are strategies to improve weed control results for each HT system: —Liberty LInk: As a contact herbicide, Liberty is recommended to be applied as…
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Canada’s Pest Management Regulatory Agency (PMRA) permits “unlabelled” tank mixes as long as products in the mix are used under the following conditions: 1. Each tank mix partner is registered for use in Canada on the crop of interest. Note that just because products have similar actives or are generics does not mean that they are registered for use on…
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If a burnoff didn't get done or missed key yield robbing early season weeds such as quackgrass and dandelion, then control has to be early in crop to prevent significant yield loss. For quackgrass in particular, in crop control may require a tank mix with good activity on grasses…
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More growers may have skipped the pre-seed burnoff this year — given that weed emergence was delayed with the cool start to spring and because growers wanted to get seeding. But the weeds are coming. Warmer temperatures and good moisture have inspired emergence of “carpets” of weeds in some fields. These weeds will have a tremendous impact on canola yield…
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