2009 – Issue 13

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  • Warm and Dry

    Warm and Dry Relatively warm temperatures occurred across much of western Canada last week with very little precipitation. Much of the Prairies are dry and require additional moisture soon with the exception of the eastern and Interlake regions of Manitoba, which continue to be wet in many areas. In areas with inadequate soil moisture, the […]

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  • Hail Reported Again

    Thunderstorms last week and over the weekend brought hail to a number of locations again. Mid-season hail damage not only causes physical injury on the plant but is also a concern for disease access. The hail wounds on the plant can provide points of entry for disease pathogens such as sclerotinia stem rot, alternaria black […]

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  • Canola Flowering – Time to Evaluate Sclerotina Risk

    Late-seeded and re-seeded canola fields are beginning to flower. These fields should now be assessed for risk to sclerotinia stem rot infection to determine if a fungicide application will be economical. Remember, many factors affect the risk of infection including: Heaviness of the crop canopy Amount of moisture received in the two weeks prior to […]

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  • How to Apply a Fungicide with Variable Stages

    This year has certainly been challenging for canola production and as a result, crop staging is wide ranging in some fields. Should a fungicide be applied now when the oldest plants flower or later with the later-flowering plants? Each field should be assessed individually for risk of infection from sclerotinia stem rot.  A few things […]

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  • Insects Found – Still Monitoring

    Bertha armyworm traps continue to be used for monitoring but so far numbers caught in Manitoba and Alberta indicate the risk is low. However, trap numbers in a few locations in Saskatchewan have surpassed the low threshold and fields in these areas may need to be watched more closely in the coming weeks. A risk […]

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  • Opportunity to Support Canola Research

    Dan Johnson at the University of Lethbridge is looking for cooperators to participate in field research for a bio-pesticide for grasshopper control in canola. Information on the pesticide is available at the following link:http://people.uleth.ca/~dan.johnson/metar.htm. A field test would generally fit into 25 acres of infested crop. Growers with grasshoppers in canola who are interested in […]

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  • Bud Bouqueting – Thrips to Blame? Send Samples for ID

    Reports continued this past week of  bud bouqueting — where flower clusters develop in the centre of the rosette without bolting — from fields in southern, central and Peace Region of Alberta. The internodes on the primary branch are shortened and, as a result, the buds appear within the centre of the rosette. A number […]

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  • Affected Patches Appearing – Find out Why

    At this time of year as the canola crop finishes flowering and begins to pod, stressed or affected patches often appear within the field. These patches are often most noticeable because they come out of flower sooner than the rest of the field. This is a good opportunity to scout and to determine what is […]

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  • Harvest Approaching – Start Planning Now

    If warm, dry conditions continue, cutting of the earliest canola fields may begin within three to four weeks. After flowering (pod filling), is a good time to assess yield potential leading up to harvest. The variable staging this year has not evened out and will require more management at harvest. It may be beneficial to […]

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  • Keep Malathion OUT of Canola Bins

    As bins are prepared for the coming harvest, keep in mind that using malathion on canola seed or in canola storage bins will result in detectable levels of malathion residue because malathion has a strong attraction to the oil in canola seed. Consequently, malathion can move into canola seed from storage bin walls. Detection of […]

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Canola Watch