Fall control

  • Give weeds time to re-grow before spraying

    Fall control

    Fall is a good time to control perennial and winter annual weeds, but spraying immediately after harvest may not provide the best results. Before spraying, identify the weeds present. Are they perennials? Winter annuals? Annuals? Clubroot hosts?

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  • Dry soils: Fall management considerations

    Fall control

    Dry conditions throughout the summer and heading into winter could have ramifications for field management decisions this fall and rotation planning for next year.

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  • Fall herbicide: Frost, volunteer canola, cleavers and more

    Fall control

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  • Weeds: Late September, early October for perennials

    Fall control

    Perennials such as thistles and dandelions are best controlled from mid-September to early October. Waiting at least a month after cutting will increase the target leaf area, but later dates increase the risk of losing healthy leaf tissue to frost. Without healthy leaf tissue, the herbicide can’t get translocation to the weed’s crown and storage roots where the killing can occur.

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  • What is the best time for fall weed control?

    Fall control

    Fall is a good time to control perennial and winter annual weeds, but spraying immediately after harvest may not provide the best results.

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  • Spraying weeds in November

    Fall control

    Warm weather has some weeds showing and growing again. If weeds are green, leaf tissue is still relatively pliable and temperatures are relatively warm, growers may still have an opportunity to control perennial and winter annual weeds.

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  • Spraying weeds after frost and snow

    Fall control

    When freezing temperatures stop fall weed control plans, snow is likely more of a help than a hindrance with respect to overall weed condition. The snow layer is likely to insulate the weed leaf material from the colder conditions that follow it. That could mean you’re back spraying earlier than you would be with frost alone. Spray decisions — when to spray or whether to spray at all — will depend on leaf condition after the snow is gone.

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  • Top 10: Planning for next season

    Fall control

    fall_weeds_cut_whetter600

    In preparation for next season, here are a few field and office jobs and WHEN to start them.

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  • When to spray weeds in the fall?

    Fall control

    Fall is a good time to control perennial and winter annual weeds, but spraying immediately after harvest may not provide the best results. Perennial weeds cut off at harvest need time to accumulate new leaf tissue to absorb herbicides. Four weeks is a minimum recommendation and six weeks is ideal.

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  • Fall weed control: pre-canola options

    Fall control

    Canola is sensitive to carryover from many herbicides. Here’s the list of products that could be used this fall on fields planned for canola next spring, but read the notes carefully.

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  • Fall weeds: When to spray?

    Fall control

    Narrow-leaved hawk's beard

    Fall is a good time to control perennial and winter annual weeds, but…(1) Wait for post-harvest regrowth and (2) Know the best timing for the weeds present.

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  • Weed management before and after harvest

    Fall control

    Pre-harvest weeds and green crop. Credit: Ian Epp

    Pre-harvest is a good time to dry down weeds to make straight combining go more smoothly. A pre-harvest application can also provide some weed control on late growing weeds — but is often too late to stop seed production.

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  • Do a pre-snow winter annual weed assessment

    Fall control

    This is an extreme case of runaway early season weeds. These should definitely get a pre-seed burnoff, probably at least a week earlier. Source: Ken Sapsford

    While it’s too late to spray effectively, growers and agronomists can check fields for the presence and population of winter annual weeds before the snow flies. This information can help with spring pre-seed burnoff and crop rotation planning.

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  • Consider tillage wisely

    Fall control

    Discing

    Western Canada has made great strides in adopting minimum tillage practices that save time and diesel fuel, improve soils and improve sustainability scores. Here are factors to consider before choosing the tillage option….

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  • Fall management to reduce canola volunteers

    Fall control

    Volunteer_canola

    The first step in canola volunteer management is to do nothing. Leaving seeds undisturbed so they germinate in the fall or get eaten by birds and insects is a good way to reduce the volunteer seedbank. Canola seeds that remain on the soil surface when the snow flies will deteriorate over the winter.

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