June 20, 2018 – Issue 12

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  • Canola Watch quiz – Normal/not normal

    Look at these six images from canola fields this week and determine if what you’re seeing is normal or not normal.

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  • Cutworms heavy in canola on canola

    Two CCC agronomy specialists heard this week of high cutworm damage in canola fields seeded into canola stubble. Canola on canola has many potential yield risks and we can add heavy cutworm feeding to that list.

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  • Map of the Week – CSPW

    With earliest canola fields starting to flower in southern Alberta and southwest Saskatchewan, cabbage seedpod weevil scouting season begins. Here is the forecast map for 2018 based on 2017 surveys.

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  • Unexpected herbicide damage: Scenarios

    Unexpected carryover can occur when dry conditions in the year of application slow the expected pace of breakdown of herbicides. Unexpected residue damage is a risk any time a sprayer is left full while waiting for an opportunity to spray, or when sprayers are not effectively cleaned between crops and between products.

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  • Inversion and drift: Risk factors

    Risk factors for wind-blown herbicide drift: Fine spray droplets and higher winds can cause sprays to drift to off-target areas. Drift tends to affect only those plants immediately downwind, but it can move several feet into shelterbelts and neighbouring fields. Drift prevention tips. Risk factors for inversion-caused herbicide drift: Low wind and clear skies can […]

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  • Is a second in-crop herbicide application necessary?

    A second application of in-crop herbicide is not always economical if the crop is well established, competitive and ahead of the remaining weed population. A second in-crop spray only makes sense if…

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  • Sentinel story: Plant count case study

    By Ian Epp Plants are fully emerged, making it a great time to take a look at canola plant stand and decide if you’re feeling satisfied or disappointed. The first herbicide application is a great way to extensively “scout” fields from the sprayer, but trying to scan plants as they pass under the sprayer just […]

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  • How to manage a thin stand

    Thin stands often require a lot more babysitting. Scout early, scout often and keep good notes.

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  • Cabbage seedpod weevil: Early fields at highest risk

    Earliest canola fields are just coming into flower in southern Alberta and southwest Saskatchewan, the highest-risk areas for cabbage seedpod weevil in Western Canada. Cabbage seedpod weevils tend to cluster in fields that are first to flower, so farmers with early fields will want to check them closely.

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  • Sclerotinia risk assessment: Fungicide planning

    As earliest canola crops start to flower, the annual sclerotinia stem rot management conversations begin. This article describes factors that increase risk and reduce risk.

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  • After the hail

    How many plants recovered? Are they at early stages and at risk of heavy blackleg infection? What is the crop nutrition situation?

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  • ICW: Gather with the world’s brightest clubroot brains

    The International Clubroot Workshop, a gathering of clubroot researchers, is August 7-9 in Edmonton. Extension specialists, municipal staff, canola growers and anyone else interested in clubroot management are welcome to attend.

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