Canola Watch 2020 exam – Section 1 – Disease management

This is the first of seven sections for this year’s Canola Watch annual CCA/CCSC exam. By dividing the exam into seven separate sections, we give CCAs and CCSCs the opportunity to customize the exam based on credits they need and to take some in 2020 and some in 2021.

Those who achieve 70 per cent or better on this section will qualify for 1 CEU (CCA or CCSC) in Integrated Pest Management.

Credits will apply in either 2020 or 2021, depending on when you pass this section. For those who pass, Canola Watch will submit your name and number to the program to have the credits counted.

When writing this self-study exam, note that all answers can be found in Canola Watch articles as well as Canola Watch videos, podcasts and Canola Encyclopedia and Canola Digest links from 2020. You can find the Issue Archives as well as the video and podcast libraries under the “Canola Watch” tab at the top of canolawatch.org.

For questions or additional information on this exam, please contact Jay Whetter at 807-468-4006 or whetterj@canolacouncil.org.


Canola in Canada faces potential yield loss from a number of diseases, including sclerotinia stem rot, clubroot, blackleg, seedling diseases and now verticillium stripe. Crop rotation that includes at least a two-year break between canola crops is an important step in disease management. Other recommendations are to scout for the disease, make management decisions based on scouting and field testing, and employ genetic resistance appropriate to the risk situation in each field. CCAs and CCSCs completing this section will pick up tips from 2020 experiences and enhance their approach to canola disease management.

REQUIRED - Your full name:

Your CCA number: (leave blank if not applicable)

Your CCSC number: (Leave blank if not applicable.)

REQUIRED - Email address:

Phone number:

REQUIRED - What region best describes your work territory?
1. In a May 27 article on seedling diseases (and other emergence issues), Canola Watch shared some information on two common groups of Rhizoctonia solani, the pathogen that causes wirestem and brown girdling root rot. One group, called AG2-1, is a “crucifer specialist” and tends to be the more common group in what region of the Canadian Prairies?
2. In the June 3 issue, Canola Watch posted a podcast on the “three amigos” of the seedling disease complex. (Find all podcasts here.) Between the 10- and 15-minute marks, Krista Anderson mentions this particular soil condition this is “perfect” for seedling disease pathogens.
3. An August article had lots on blackleg scouting and identification, including a note that private labs can run tests to identify L. maculans races on infected plant pieces. Test results can help farmers choose a canola hybrid with resistance to the dominant races in a field. Many genes are responsible for blackleg resistance in canola and there are at least ___ described resistance genes identified globally. Fill in the blank.
4. Episode 26 of the Canola Watch agronomy video series (find the Canola Watch video playlist here) is “blackleg scouting”. What does the video say is the best crop stage to scout for blackleg incidence and severity?
5. A September article called “How to identify verticillium stripe” will help people distinguish the disease from blackleg, sclerotinia stem rot and other stem diseases. It also describes how the disease works. How does verticillium stripe kill a canola plant?
6. While verticillium stripe has certain symptoms that are somewhat similar to blackleg and sclerotinia stem rot symptoms, it also has something in common with clubroot. What is it?
7. Episode 27 of the Canola Watch agronomy video series is on “verticillium stripe”. (Find all videos here.) To help with scouting, what is the key distinguishing feature of verticillium stripe?
8. Sclerotinia infection depends on moisture and humidity, of course, but also the presence of spores. Presence of spores can be assumed based on moisture conditions and a history of the disease. Another option is to use a commercial spore test. Based on an article from July 2, how many labs offer sclerotinia spore test services in Western Canada?
9. A September article on seed trait standards explains the registration requirements for canola cultivars. In terms of infection level, what is the difference between clubroot-resistant and clubroot-susceptible canola cultivars?
10. An October article, “How to collect soil samples for clubroot,” has helpful tips on timing and location of sampling. While the following tips all apply to soil sampling for clubroot, which is the key message from the disclaimer at the bottom of the article?