Report shows need for diversity in soybean cyst nematode resistant varieties

By: Cami Koons

Outlets: Iowa Capital Dispatch

Published: August 24, 2026

Words: 522

Last Updated: 1 month, 3 weeks ago

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A report analyzing nearly 20 years of field data collected by Iowa State University on soybean cyst nematodes shows the tiny, parasitic roundworm has continued to adapt to the industry’s most popular resistant variety.

The analysis looked at PI 88788, a type of soybean cyst nematode resistance in seed varieties, and found the ability for the nematodes to reproduce on PI 88788 soybeans increased approximately 2%, annually, from 2001 through 2023.

If …

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