Canola Watch – June 23, 2021

June 23, 2021

Watch the video for some tips on how to manage cabbage seedpod weevils.

Canola Quiz – Leaf damage

Can you identify the leaf damage? Proper diagnosis often requires some thinking-through of all possibilities.

Take the Quiz

In This Issue

Get on top of cabbage seedpod weevil
Since first discovered in southern Alberta, the canola insect pest known as the cabbage seedpod weevil has made its way across the southern Prairies over the years, threatening considerable yield loss. Basically, the earliest canola to flower is most at risk of infestation so you need to start sweeping for the insects. Watch the video above for more information. This article is a know-your-enemy resource with a wide gamut of scouting and management tips, including when to spray. For interesting findings on these insects, check out these research projects.

CanolaCounts a quick, easy way to count plants and win prizes
If you’re a canola grower or agronomist who hasn’t used yet, here are some good reasons to do so:

  1. Scouting fields for plant establishment and recording the results can help make better decisions for next year — you can’t improve what you don’t measure.
  2. It’s quick and easy. It only takes around 60 seconds to input data.
  3. You can see how your establishment compares to your neighbours’.
  4. You can win a prize! You’re automatically entered in a weekly draw for a $50 gift card from Peavey Mart and a grand prize of $100 with each CanolaCounts entry. Odds of winning both are good.

Do I need a second herbicide pass?
This is the time of year when canola growers may be asking themselves if they should do a second herbicide pass. 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. If you don’t know that for sure, scouting (while using is an important way of finding out. Second-pass herbicide: why and when? offers some in-depth advice you can use when making this critical decision. This article lists several popular herbicides registered for canola and the crop growth stages their labels recommend.

Act quickly if top-dressing nutrients
If you’re thinking of applying a top-dress of nitrogen or sulphur fertilizer, your window of opportunity is closing fast. Nitrogen is ideally applied before the five-leaf stage so it is available when plant nitrogen utilization increases. Check out this article for information on when top-dressing makes sense and when it doesn’t. For tips on applying nitrogen and sulphur in-season, click here.

Having a hard time? Remember it’s not over ‘til it’s over
It would be an understatement to call this year’s canola growing season “challenging.” Depending on where you are on the Prairies, you may have experienced drought, high winds (even tornados), hail, and frost. What’s important to remember is that overall yield potential for canola is not yet set; if your crop is looking bad right now, there’s still potential for things to turn around. This might include a timely rainfall that makes a huge difference, for example. In the meantime, check out Spraying tips for tough conditions for some timely advice on spraying in adverse conditions.

Scout Checklist

Diamondback moth larvae

Root rots


Community Connect — Help us crowdsource plant establishment data! If you don’t have time to enter individual fields into but still want to participate, contact Autumn Barnes ([email protected]), who can help get bulk data entries included in the Spring 2021 Canola Counts maps.

Do More Ag – 2021 has thrown a lot at all of us. Mother Nature has shared everything from drought, drowning and hail to extreme heat, frost and even a few tornados. Visit for resources, crisis lines and websites that can help with your mental well-being.

Improving sclerotinia risk assessment – The Canola Council is looking for volunteers to beta test a new sclerotinia risk assessment calculator in a few weeks. This tool is being built by CCC and AAFC researchers using an older sclerotinia algorithm that needs updating prior to its full launch in 2022. Beta testers are asked to use the app to assess sclerotinia risk at early flower in a field. They are then asked to rate the amount of sclerotinia in that same field at the end of the season. The data collected from the app and the resulting sclerotinia infection will ensure the new tool will provide good predictive function for canola farmers. If you are interested in participating and improving sclerotinia control for the industry, please email your name and location to [email protected].

Send in your flea beetle damage pics – Justin Pahara, an Agriculture and Agri-Food Canada (AAFC) scientist at Lethbridge, would appreciate flea beetle damage scouting photos to help test their ability to accurately analyze images for defoliation. “With the help of producers, our team at AAFC hope that the wide variety of canola leaf images from different geographic regions with different image backgrounds (tilled soil vs. no-till) in wet and dry conditions, on sunny and cloudy days etc will be a good start to creating an artificial intelligence-based software tool that makes objective crop damage assessments possible and simple,” says Pahara. Please send your flea beetle scouting photos to [email protected] if you can assist in this citizen science effort. When you email photos in, please use the email subject “Canola damage pics.”

Soil health assessment project – Researchers at the University of Saskatchewan are looking for growers to participate in a soil health assessment project. The project, conducted by Kate Congreves and Zelalem Taye, aims to develop a soil health testing protocol and online tool tailored to Saskatchewan’s climate and major soil zones. This summer, they will collect soil samples from volunteer farmer fields across Saskatchewan and record general crop management information for each field. Confidentiality of farmers information is maintained and no reference to specific farms will be made public. Farmers are encouraged to register here to participate in the project. They can also sign up by sending an email to this address: [email protected].



Canola Watch is a free, unbiased, timely and research focused weekly newsletter from the Canola Council of Canada Crop Production Team

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Upcoming Events

Grower Engagement Meeting - Lethbridge

Alberta Canola is hosting four Grower Engagement Meetings across Alberta during November & December 2021.
Nov 17
Lethbridge, Alberta

Grower Engagement Meeting - Nisku

Alberta Canola is hosting four Grower Engagement Meetings across Alberta during November & December 2021.
Nov 23
Nisku, Alberta

The Agricultural Excellence Conference

AgEx is the only event in Canada dedicated exclusively to bringing farm management enthusiasts together to build their business acumen. This year’s theme, The Challenge of Change, is about acknowledging that change...
Nov 24 - Nov 26
Online, Webinar

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