By Stephanie Porter
Managing nematodes isn’t getting easier—but the tools to stay ahead of them are getting better. The SCN Coalition has released a new set of Soybean Nematode Field Guides, all in one place, to help farmers quickly identify nematode threats and protect yield. You can check them out here: https://www.thescncoalition.com/field-guides/
These guides break down the four major nematode groups that impact soybean yield across the U.S.:
- Soybean Cyst Nematode (SCN) – the top yield-robbing pathogen of soybeans, often causing up to 30% loss with no visible above-ground symptoms.
- Root-Knot Nematode (RKN) – widespread and capable of taking a quarter of yield in hot spots.
- Root Lesion Nematode (RLN) – more than 100 species strong and a threat to both soybeans and rotational crops like corn.
- Reniform Nematode – a growing issue in the South, capable of double-digit yield losses.
Each guide offers:
- Clear photos to help with identification
- Management strategies backed by university research
- Tips on sampling, resistant varieties and rotation decisions
- Practical steps tailored for different regions and production systems
Nematodes are often characterized as “silent yield thieves,” but simple, timely testing and management choices can make a big difference. These field guides make it easier to know what you’re dealing with and what to do next. A little knowledge now can protect a lot of yield later.
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