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Most products are not strongly affected by dust, but glyphosate is an exception. What about wind? Or cold?…
Weed spraying in challenging conditions
May 15, 2019
In-crop
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Watch for suspicious weed patches (kochia angle)
June 27, 2018
With herbicide applications winding down, this is a good time to scan fields for suspicious weeds that escaped the management effort. The photo from Tammy Jones shows glyphosate-resistant kochia…
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Late herbicide: Is it worth it?
June 27, 2018
Too windy. Too wet. Sometimes both. This pushed back a lot of weed management and some fields are still not sprayed. In this situation, intense weed pressure can reduce yields by 20%, 30%, 50%... That's why early weed control has a huge positive effect on profitability, but late control is better than nothing. Late control can stop the yield loss,…
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Is a second in-crop herbicide application necessary?
June 20, 2018
A second application of in-crop herbicide is not always economical if the crop is well established, competitive and ahead of the remaining weed population. A second in-crop spray only makes sense if…
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Spray early: Economics of early weed control
June 6, 2018
One of our Alberta agronomy specialists encountered the situation in the photo. Canola emergence was patchy in this small area, but generally good overall. The bigger issue was the big population of tiny weeds. The agronomy specialist wondered if these buckwheat seedlings, though very abundant, were too small to spray? The answer is no…
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In-crop herbicide timing – scenarios
May 30, 2018
In general, early is the best for herbicide timing. A few early weeds emerging before or at the same time as canola plants are much more damaging to yield than……
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Second herbicide application: A scenario
July 6, 2017
A Canola Watch reader sent us this question: I have wild buckwheat at the 3- to 4-leaf stage that somehow got missed with the first application of Liberty 10 days ago . It's moderate in severity. Will it cause me grief at swath timing? And or will it have any effect on yield? Crop stage is 6-leaf or so…
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Late herbicide: Is it worth it?
July 6, 2017
Wind and wet pushed back a lot of weed management and some fields are still not sprayed. In this situation, intense weed pressure can reduce yields by 20%, 30%, 50%... That's why early weed control has a huge positive effect on profitability, but late control is better than nothing. Late control can stop the yield loss, stop weeds from contributing…
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Is a second herbicide application necessary?
June 22, 2017
A second in-crop spray only makes sense if…