Weeds

Canola Watch provides timely answers to top canola agronomy questions on diseases, insects, weeds and so much more.
Featured image for “Aerial options for weed control”
June 20, 2012

Aerial options for weed control

If weeds and crop are advancing toward the end of the application window and the ground is too soft and wet to support a
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Featured image for “Spray tank contamination: Risks and clean-out tips”
June 13, 2012

Spray tank contamination: Risks and clean-out tips

Canola can be damaged by trace herbicide residues left in a sprayer tank. This article underlines the importance of a complete clean out between
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Featured image for “Drift management tips”
June 13, 2012

Drift management tips

To reduce drift, use coarse sprays and apply at lower pressure, spray with at least some wind (calm is bad), slow down, consider shrouds,
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Featured image for “Crop staging and herbicide timing”
June 13, 2012

Crop staging and herbicide timing

Rain has set back weed spraying. Early canola crops are near the end of their spray windows, even though some fields have not received
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Featured image for “Grassy weeds advancing”
June 6, 2012

Grassy weeds advancing

LL: Use high water volumes for Liberty and use the Group 1 tank mix. RR: Use the 180 ae rate of glyphosate if you
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Featured image for “Tank mixing herbicide with fungicide or insecticide”
June 6, 2012

Tank mixing herbicide with fungicide or insecticide

If an insect or disease threat is present at economic thresholds and within the weed control window, applying herbicides with other pest control products
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Featured image for “Spraying in cool temperatures”
May 31, 2012

Spraying in cool temperatures

Cool cloudy days after cool nights will result in lower herbicide efficacy than applications made in warm sunny days. Cloudy days don’t provide the
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Featured image for “Spray weeds early in crop”
May 24, 2012

Spray weeds early in crop

In-crop weed control should occur as early as possible since canola is much more vulnerable to weed competition prior to reaching complete ground cover.
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Featured image for “Frost: When can I resume weed control?”
May 16, 2012

Frost: When can I resume weed control?

No time to wait? Growers who want to do a preseed burnoff and then get seeding may not want to wait 3-4 days for
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Featured image for “Flush out herbicide residue in sprayer tank”
May 16, 2012

Flush out herbicide residue in sprayer tank

Adjuvant systems used in in-crop herbicides used in canola are very effective tank cleaners and will remove the smallest residue of herbicide remaining in
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Featured image for “Spray weeds or get seeding?”
May 9, 2012

Spray weeds or get seeding?

Seeding is a priority for many growers this week, but fields with a large population of weeds, especially advancing winter annuals, should get a
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Featured image for “Weeds: Foxtail barley | Glyphosate-resistant kochia”
May 2, 2012

Weeds: Foxtail barley | Glyphosate-resistant kochia

Foxtail barley has proliferated in some fields that were unseeded last year due to excess moisture. If it’s in patches, tillage may be the
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