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Some canola fields are looking weedier than expected for this time of year. If you see fields like this, think about the cause and, if appropriate, consider a different approach next year…
Late-season weeds: Management options
August 15, 2018
Weeds
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Pre-harvest products for use in canola
August 1, 2018
What is the goal with a pre-harvest application? If weed control is the goal, assess the weed situation before spraying. If desiccation (crop and weed dry-down) is the goal for straight combining, this decision should wait until just before harvest. Here are the pre-harvest options for canola…
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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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Unexpected herbicide damage: Scenarios
June 20, 2018
Unexpected carryover can occur when dry conditions in the year of application slow the expected pace of breakdown of herbicides. Unexpected residue damage is a risk any time a sprayer is left full while waiting for an opportunity to spray, or when sprayers are not effectively cleaned between crops and between products…
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Inversion and drift: Risk factors
June 20, 2018
Low wind and clear skies can cause inversions, which can increase the risk of spray drift. This article explains how to identify (and avoid) an inversion scenario when spraying. The……
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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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Herbicide carryover, sprayer contamination or something else entirely?
June 13, 2018
Injury from herbicide residue in the soil can only occur in fields with a history of Group 2, 4, 5 and 14 herbicide applications. While soil characteristics and dry conditions can extend the at-risk period for these herbicides, carryover issues often occur when required recropping intervals are not followed. For example, Roundup Ready or Liberty Link canola cannot be seeded…
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Tips for spraying in the wind
June 13, 2018
How do you spray weeds in a timely fashion when every day seems too windy? Here are some tips…