Canola Watch – July 15, 2016

June 15, 2016

JUNE 15 QUIZ — NUTRIENT TOP DRESS

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Three questions to test the basics on top-dressing fertilizer….

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LACOMBE PRIMED FOR ‘PALOOZA

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canolaPALOOZA plots at Lacombe are looking great. for the June 28 canola event of the summer!

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CABBAGE SEEDPOD WEEVIL: WHEN TO SPRAY

Cabbage seedpod weevil on canola buds. Credit: Brooke Moon

Cabbage seedpod weevils are attracted to the buds on early canola plants, as shown in this Brooke Moon photo. While they will feed on these buds and destroy some of them, spraying is rarely recommended before 10% bloom.

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HOW TO IDENTIFY YOUR WEEVILS

Cabbage seedpod weevil. Credit: S.J.Barkley, Alberta Agriculture and Forestry
Pea leaf weevil. Credit: S.J.Barkley, Alberta Agriculture and Forestry

Pea leaf weevils (bottom) can be found in canola but the only weevil of concern is the cabbage seedpod weevil (top). Thank you Shelley Barkley of AAF for the excellent photos.

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SEED DEPTH ASSESSMENT

Use a seed depth tool to mark the depth where seed was found. Then use the blade of a shovel to mark ground level on the tool. Credit: Brooke Moon

Seeding too deep is a common stand establishment issue in canola. This becomes clear as plants emerge, especially when some rows emerge earlier and more vigorously than others.

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TIPS FOR SPRAYING IN THE WIND

Herbicide drift injury on canola. Drift can be costly on your own farm and especially awkward and costly if it carries to a neighbouring farm.

Here are tips to improve performance and limit the drift risk in wind….

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WEED COMPETITION: THE SECOND APPLICATION

Some canola fields face intense competition from grassy weeds this year.

Growers who usually spray twice may not need that second pass this year if the canopy has closed, weeds are behind the crop, and the recommended application window is past. A second application only makes sense when….

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LATE HERBICIDE: MAKE A BALANCED DECISION

Spraying late or at higher-than-label rates can reduce canola profits.

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LOOK FOR BLACKLEG LESIONS

Blackleg lesion on young canola. Credit: Angela Brackenreed

Blackleg infection prior to the four-leaf stage can result in serious yield loss, but blackleg can be difficult to identify on such small plants.

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CUTWORMS: RESEEDING AND THE RISK PERIOD

Redbacked cutworm with pupae. If you see a lot of pupae, it may signal the end is near for the cutworm threat.

Usually by the end of June, most of the cutworms that overwintered as eggs or partly grown larvae (including redbacked, as shown in this John Gavloski photo) have pupated and are no longer a risk to crops. In early and warm springs, cutworms will often pupate earlier in June. In cooler spring, cutworm activity often carries into July before pupation.

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TOP DRESS TIPS FOR NITROGEN AND SULPHUR

The ideal timing for fertilizer application is at seeding. This saves an extra pass over the field and ensures that the expected fertilizer requirement is in place when the crop needs it. But if nutrient loss or increase crop yield potential have changed the situation, in-crop applications may be economical. Here are tips…

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Upcoming Events

John Mayko's canola crop walk

Speakers include Dan Orchard, Kelly Turkington, Breanne Tidemann and more
Aug 21
North of Mundare, Alberta

Webinar: Getting your farm certified for EU exports

It’s a simple and free process that will expand your market access, and most Canadian producers already qualify. Please join us for a webinar to learn more about this opportunity.
Aug 22

canolaPALOOZA late season crop walk

Join us for one last look at the 2019 canolaPALOOZA plots
Aug 28
Lacombe, Alberta

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