Dilantha Fernando explaining the interaction between blackleg and verticillium at the University of Manitoba's field day at the Ian M. Morrison Research Centre in Carman in July.

Verticillium may undermine canola blackleg resistance

Co-infections with verticillium stripe may compromise blackleg resistance protection in canola, new Manitoba research suggests

University of Manitoba research finds verticillium stripe in canola can break down blackleg resistance, creating challenges for disease management and yield protection on the Prairies.

The fungal disease remains one of the most prevalent threats for canola, and got particular traction this year after a wet spring created friendly conditions for its development.

Gene testing for blackleg race: How useful is it to the farmer really?

Matching races of blackleg to resistant genes in canola varieties has been praised as a more precise way for growers to beat blackleg, but is it all it’s made out to be?

Matching races of blackleg to resistant genes in canola varieties has been praised as a more precise way for growers to beat blackleg, but is it all it's made out to be?



Striped flea beetles gather on a canola plant.

Prepping for the 2024 canola crop

Planning for crop stresses now will set growers up for success when it is time to act: agronomists

Winter isn’t exactly prime time to scout for insects, diseases and weeds, but last year’s pests may provide a baseline to help prepare for the next canola crop, agronomists say. “Review the challenges you had last year and have a plan in place as to how you’re going to handle them this year,” said Warren

Verticillium stripe and blackleg symptoms can look similar, but once you know what you’re looking for they can be quickly differentiated.

Verticillium stripe symptoms

Is it verticillium stripe, blackleg or sclerotinia? Here are ways to find out

The Canola Council of Canada flags several verticillium signs: Stem striping When the crop is full height, but still green, infected canola plants will often have a two-toned stem — half healthy and green and half discoloured and drying down. This is where the disease gets its name. Leaves can show similar symptoms: healthy on


"We have seen that
the crop is more
likely to lodge when the
stem is weakened by
verticillium and, with
these pod-shatterresistant
varieties that
are left to stand longer,
you might have parts
of the crop lying down.”

Verticillium gains ground on blackleg, sclerotinia in Manitoba

Survey numbers sum up Manitoba’s top canola disease issues last year

Farmers preparing to seed canola might want to take a minute to visit the Canola Council of Canada’s website. The national group, drawing on data from the 2022 Manitoba Canola Disease Survey, has summed up the most significant disease threats growers faced last year. Posted through the council’s Canola Research Hub, the information also covers

Blackleg at the base of canola stems.

An inoculation against blackleg

University of Manitoba trial shows a less-virulent strain boosts canola’s natural defences

A new biological control strategy could be a game changer in the battle against blackleg in canola. The fungal infection that has a yield-destroying effect on canola crops was first discovered in Saskatchewan in 1975 and eventually spread across the country. Blackleg is the result of the interaction between two closely related fungal species, Leptosphaeria

Blackleg at the base of canola stems.

Getting a leg up on blackleg

New research finds blackleg populations are more diverse in Manitoba

New genomic research from Agriculture and Agri-food Canada (AAFC) could give agronomists a leg up in the fight against blackleg in canola. Blackleg (Leptosphaeria maculans) is a severe fungal disease of canola plants, and with canola generating about one-quarter of all farm crop receipts in Canada, it is a serious threat to producers. The new research was


Blackleg and verticillium stripe are sometimes even found in the same plant. 

Canola foes the same — but different

Blackleg and verticillium stripe can be confusingly similar

Is it verticillium stripe or is it blackleg? That’s a question canola growers may find themselves asking more in the future, as verticillium stripe (VS) gains a stronger foothold on North American farms, a recent webinar hosted by the Prairie provinces’ canola associations heard. It was first discovered in Manitoba in 2014 and is caused

(Cropscience.bayer.ca)

DeKalb pulls two ‘inconsistent’ canolas off market

Up against an “inconsistency of grower experiences” with the seeds’ yields in 2019, Bayer Canada is yanking two of its DeKalb TruFlex canola hybrids from the market. DeKalb’s DKTF 92 SC and DKTF 94 CR will not be available for 2020, Bayer said. Canola growers who have already booked those seeds for this spring are