Soybean-quality problems multiply

Badger Crop Network
Oct 23, 2026
2 hrs ago

1 of 2

As the U.S. soybean harvest progresses, independent reports of seed-quality problems are increasing across the country. A 2026 soybean sample from Iowa showcases a variety of seed-quality problems that include soybeans of other color, purple seed stain, green seed and Diaporthe seed decay.

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Badger Crop Network

As the U.S. soybean harvest progresses, independent reports of seed-quality problems are increasing across the country. Specific problems vary by region and sample, though multiple issues are co-occurring in certain areas. Although the Federal Grain Inspection Service maintains standard definitions for soybean classes – yellow or mixed – and grades them on specific factors, reports indicate significant variation in how soybeans are currently being classified, graded and docked in 2026.

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Authors are Shaun Casteel, Purdue University; Shawn Conley, University of Wisconsin; Seth Naeve, University of Minnesota; Carrie Ortel, Virginia Tech; and Haleigh Ortmeier-Clarke and Rachel Vann of the University of Illinois.