Weeds

Canola Watch provides timely answers to top canola agronomy questions on diseases, insects, weeds and so much more.
Featured image for “Big cleavers need pre-seed control”
May 13, 2015

Big cleavers need pre-seed control

Winter annual cleavers are reported in high numbers in some fields. These need to be sprayed before seeding to prevent them from getting really
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Featured image for “Early weed removal is best”
May 6, 2015

Early weed removal is best

Early weeds have large impact on canola yield potential. Past research has demonstrated an advantage of 3 bu./ac. for controlling weeds at the 1-2
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Featured image for “How to prevent selection for herbicide-resistant weeds”
May 6, 2015

How to prevent selection for herbicide-resistant weeds

The first few weeks of the growing season is a great time to police fields for suspicious weeds. Look for weeds that lived through
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Featured image for “Take a close look for small weeds”
April 29, 2015

Take a close look for small weeds

From the road, many fields look clean this time of year, but look closer. Weed seedlings are often present at high numbers, and these
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Featured image for “How long to wait between spraying and seeding?”
April 29, 2015

How long to wait between spraying and seeding?

Seeding can begin fairly soon after a burnoff — but take note of the weeds present.
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Featured image for “Hitting the narrow post-seed, pre-emergence window”
April 29, 2015

Hitting the narrow post-seed, pre-emergence window

Growers who seed before spraying may want to apply in the narrow post-seeding pre-emergence window. But if that window is missed, early in-crop weed
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Featured image for “Manage cleavers through the whole rotation”
April 29, 2015

Manage cleavers through the whole rotation

While cleavers are a bigger issue in canola, given the competitiveness of the weed and the grade loss from weed seeds in the sample,
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Featured image for “Idle sprayers increase herbicide residue risk”
April 29, 2015

Idle sprayers increase herbicide residue risk

Sprayer sitting uncleaned for a couple days in the pre-seed window could result in tank and plumbing residues that could come back to haunt
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Featured image for “Use multiple modes in the pre-seed window”
April 22, 2015

Use multiple modes in the pre-seed window

Step one in the pre-seed weed control plan is to see what weeds are present — annuals, perennials, winter annuals — and at what
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Featured image for “Keep It Clean — 3 things you need to know about pesticide use”
April 22, 2015

Keep It Clean — 3 things you need to know about pesticide use

Around 90% of Canadian canola is exported, and our customers have high standards when it comes to clean seed, oil and meal. It is
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Featured image for “Long spring increases value of pre-seed burnoff”
April 2, 2015

Long spring increases value of pre-seed burnoff

Weeds may start re-growing and emerging sooner this year if the weather stays warm. The more weeds up and growing ahead of the crop,
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Featured image for “Fall weeds. When is too late to spray?”
October 8, 2014

Fall weeds. When is too late to spray?

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
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