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Twisted Whorls and Yellow Leaves Making an Appearance

Twisted Whorls and Yellow Leaves Making an Appearance

By Mark Licht

It is that time of year when twisted whorls and yellow leaves are making an appearance in corn fields across the state. This is commonly referred to by many names, regardless, it is nothing to be overly concerned about unless it is very prevalent in your fields.

High prevalence could be related to growth regulator herbicides or even a hybrid with a higher tendency for occurrence. Wait a couple days with sunlight and a little wind and you’ll hardly notice it even existed.

Here is more information on rapid growth syndrome.

Source : iastate.edu

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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