Wheat Head Armyworm a Sporadic, But Insidious Pest

Nov 28, 2022

The wheat head armyworm are a random threat and hard to find in Alberta fields.

An army could be invading your field at this very moment, and you might not even know it.

The wheat head armyworm is a sporadic pest that feeds on cereal grains such as wheat and barley here in Alberta and the rest of the Prairies. While its usually a minor nuisance, it can occasionally cause significant damage to the kernels of a cereal crop which can result in the crop being downgraded when it’s screened at an elevator. In fact, one wheat head armyworm can wipe out the equivalent of an entire head of wheat in a single day.

Part of the challenge for farmers when it comes to dealing with wheat head armyworms is that they can be extremely difficult to spot in a field, says Tyler Wist, a research scientist in field crop entomology for Agriculture and Agri-Food Canada (AAFC).

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Video: Root Exudates, Soil Biology, and How Plants Recruit Microbes | Field Talk Friday

Field Talk Friday | Dr. John Murphy | Root Exudates, Soil Biology, and How Plants Recruit Microbes

Most of us spend our time managing what we can see above ground—plant height, leaf color, stand counts, and yield potential. But the deeper you dig into agronomy, the more you realize that some of the most important processes driving crop performance are happening just millimeters below the surface.

In this episode of Field Talk Friday, Dr. John Murphy continues the soil biology series by diving into one of the most fascinating topics in modern agronomy: root exudates and the role they play in shaping the microbial world around plant roots.

Roots are not passive structures simply pulling nutrients out of the soil. They are active participants in the underground ecosystem. Plants constantly release compounds into the soil—sugars, amino acids, organic acids, and other molecules—that act as both energy sources and signals for soil microbes.