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Disease Levels are Looking Good, But There’s a Catch

As planting season approaches, growers and the seed industry in Canada are gearing up for another growing season. Naturally, they are also concerned about disease. First, the good news.

Although overall the year has been average compared to the last 10 years in terms of Fusarium graminearumand other widespread pathogens, there have been some modest spikes in positive samples for Ascochyta in chickpea, which can be devastating for crops.

Although the number of positive samples isn’t high overall, the percentage of positives is higher this year than usual. The presence of Ascochyta in chickpea is a cause for concern, as even subtle upswings in disease levels can eventually turn into a problem if not taken seriously.

While there have been some increases in the number of wheat and barley samples testing positive for Fusarium graminearum in Alberta, the overall percentage of infection is slightly higher than the average of the last 10 years. However, the higher number of positives could be related to crop rotation practices. Geographically, the eastern border of Alberta shows the highest percentage of positive samples.

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Trending Video

Sclerotinia and Lygus in Seed Canola: Field Update with George Lubberts, CCA | Enchant, Alberta

Video: Sclerotinia and Lygus in Seed Canola: Field Update with George Lubberts, CCA | Enchant, Alberta

Join Certified Crop Advisor George Lubberts for this Prairie Certified Crop Advisor (Prairie CCA) field update from Enchant, Alberta. In this 12th video of the series, George takes us into a seed canola field where the male rows have been removed and the female plants are filling pods. This video was taken in the third week of August 2025.

George discusses the early signs of sclerotinia stem rot, explaining how infection begins in the stem, impacts pod development, and leads to premature ripening. He also shares insights on lygus bug management, including timing of spray applications to minimize feeding damage and maintain seed size and quality.

With cool, damp summer conditions, George notes that while disease pressure is present, overall field health remains good. The crop is just beginning to show early seed colour change, signaling progress toward maturity.

Topics Covered:

•Sclerotinia stem rot identification and impact

•Managing lygus bugs in seed canola

•Crop stage and seed colour change observations

•Timing insecticide sprays for optimal protection

•Insights from a CCA field perspective in southern Alberta