June 22, 2011 – Issue 13

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  • Issues of the week

    Rain in the western Prairies has increased optimism, especially in the Peace River region, central Alberta and parts of Saskatchewan that needed rain. But wet fields will delay timely weed control in all regions. Aerial spraying may be the best option to get weeds controlled before the crop outgrows the safe stage for application. Moisture […]

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  • Crop and weather update

    Peace Region (B.C. and Alberta): Welcome rains of 2” to 5” fell across most of the region early this week. Rains bypassed the northern Peace region and fields in that area are experiencing some drought stress. Alberta: Rain blanketed Alberta, with a few tenths to 2” in the south and an average of 2” in […]

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  • Weed control window closing

    Label application windows:
    Glyphosate: Anytime up to and including the 6-leaf stage of canola.
    Liberty: Cotyledon stage up to the early bolting stage of canola.
    Odyssey/Absolute: 2- to 6-leaf stage of canola.

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  • Water stress reduces herbicide tolerance and nutrient uptake

    Water stress can make canola more susceptible to herbicide damage. Damage can be enough to kill plants under extreme stress. Resist the temptation to increase herbicide rates if the crop is under stress.

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  • Still time for a crop nutrition top up

    Growers still have time to top up nitrogen and sulphur to take advantage of higher yield potential. Nitrogen should be applied before the 5-leaf stage to provide a strong economic benefit. Sulphur can be applied up to bolting.

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  • Disease update: Rain raises sclerotinia threat

    Sclerotinia spores will be everywhere this year after widespread infection across the Prairies last year. If fields are moist at the time of flowering, and canola has yield potential of 35 bu./ac. or more, then it will probably pay to spray a fungicide to limit sclerotinia losses. The message this week is to consider the threat and budget for action.

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  • Control cleavers, volunteer canola in cereals

    Cereal crops in rotation provide canola growers will another opportunity to control cleavers, volunteer canola and other tough weeds to reduce the threat to next year’s canola. Volunteer canola control also reduces build up of clubroot and blackleg inoculum.

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  • Insect update

    Flea beetle spraying continues in Manitoba where crops are advancing slowly due to excess rain and limited warmth. Redbacked cutworms are still causing severe damage in southern Alberta. Some sprayed fields need to be reseeded.

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  • Coming events

    Canola Council of Canada agronomy specialists will be involved in the upcoming tours and events.

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