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.
About the Author: Stephanie Porter
As Outreach Agronomist for the Illinois Soybean Association (ISA), Stephanie supports research efforts and helps communicate both in-field and edge-of-field research and validation studies to Illinois 43,000 soybean farmers. She also helps lead the demonstration and adoption of conservation agriculture practices and raises awareness of best management and continuous improvement practices for conservation agriculture in Illinois.
Stephanie has 23 years of experience that consists of agronomy, conservation, horticulture, plant diagnostics, and education. She has her bachelor’s in crop science and master’s in plant pathology from the University of Illinois. Stephanie is a Certified Crop Advisor and was named the 2018 Illinois Certified Crop Adviser Master Soybean Advisor. She also has experience with corn and soybean pathology research, crop scouting, soil testing, as well as crop consulting. Previously, she utilized her diagnostic training and collaborated with University of Illinois departmental Extension Specialists to diagnose plant health problems and prepare written responses describing the diagnosis and management recommendations as the University of Illinois Plant Clinic.
and then
Interesting to see resources for tackling soybean nematodes. How challenging are they to manage in the field?