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With an early spring in some parts of the Prairies, growers and agronomists have been asked "When is too early to spray weeds?" Spraying can start under the following conditions…
How early is too early for weed spraying?
April 6, 2016
Pre-seed burnoff
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Cleavers: Pre-seed product options for the whole rotation
April 6, 2016
There is a saying, “Good cleavers control in canola starts in cereals.” Peas and flax also offer pre-seed options not available in fields going into canola…
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Three timing options for early weed control
May 21, 2015
Weeds will be going strong with the sun, especially if they have established roots that reach moisture while newly seeded crop battles dry topsoil conditions. A second pre-seed burnoff may be in order or — if emergence is likely to be slow — the post-seeding pre-emergence window may be a little wider than usual. Either way, early weed control remains…
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Early weed control in cool or frost conditions
May 13, 2015
Early weed control with lower efficacy is generally preferable to no control at all or late control with higher efficacy — as long as weeds are present and not frost damaged…
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Big cleavers need pre-seed control
May 13, 2015
Winter annual cleavers are reported in high numbers in some fields. These need to be sprayed before seeding to prevent them from getting really large and near impossible to control with in-crop label rates. The pre-seed window provides an opportunity to hit these large cleavers with rates needed for control…
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Take a close look for small weeds
April 29, 2015
From the road, many fields look clean this time of year, but look closer. Weed seedlings are often present at high numbers, and these seedlings will only get bigger. Now is a good time to control them, especially as days and nights get warmer…
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How long to wait between spraying and seeding?
April 29, 2015
Seeding can begin fairly soon after a burnoff — but take note of the weeds present…
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Hitting the narrow post-seed, pre-emergence window
April 29, 2015
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 management is essential to hold yield potential. Some yield potential is likely already lost to weeds by that time…
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Manage cleavers through the whole rotation
April 29, 2015
While cleavers are a bigger issue in canola, given the competitiveness of the weed and the grade loss from weed seeds in the sample, growers have more options to effectively control cleavers in cereal crops. Effective cleavers management is best done with a whole rotation approach…