Aster yellows might be rare, but it can be expensive. The last big outbreak cost Prairie canola growers $400 million in yield losses, Trevor Wist of AAFC told Manitoba Ag Days 2025.
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Aster yellows rare but potentially costly Manitoba Ag Days speaker says
The last big outbreak is said to have cost Prairie canola growers $400 million in yield losses
Disease roundup: Verticillium has breakout year
Plant pathologists are still sorting through the data, but 2023 may become the year that verticillium stripe emerged a major problem for canola growers in Western Canada. In 2022, Saskatchewan Agriculture staff discovered verticillium is a common disease in the eastern part of the province. In the fall of 2023, producers in other parts of […] Read more
Disease survey finds elevated aster yellows levels in Manitoba
Clubroot levels in the province stay low, but a field near Roblin is highly infected with the soil-borne disease
Aster yellows likely reduced canola yields in some Manitoba fields this fall, as the disease was five times more common in 2023 than it was last year. Manitoba Agriculture plant pathologist David Kaminski released preliminary results of the annual canola disease survey for the province during a presentation in early September. About 20 percent of […] Read more
A bad year for aster yellows?
Aster leafhoppers are responsible for transferring the aster yellows pathogen to canola plants.
The leafhoppers blow into Western Canada from the United States, and a percentage of the insects come with aster yellows.
A bad year for aster yellows?
It's too early to predict what will happen, but testing done in Saskatchewan indicates that a relatively high percentage of aster leafhoppers are carrying the disease this year.
