Assess how cover crops influence lesion nematode populations and their impact on soybean yield through field and greenhouse studies, while identifying and evaluating the pathogenicity of different lesion nematode species found in Illinois.

• Lesion nematodes are a major but often overlooked threat to corn and soybean yields in Illinois.
• Data from Wisconsin shows 4.5% annual soybean yield loss from just one lesion nematode species (P. penetrans).
• Illinois has eight known lesion nematode species, but their specific impacts on soybean are not fully understood.
• Cover crops can act as a "green bridge" for lesion nematodes, potentially increasing populations and yield damage if mismanaged.
• This study will identify, culture, and determine pathogenicity of different lesion nematode species on soybeans.
• Expands current work on cover crop impacts on SCN, Fusarium, and other pathogens to include lesion nematodes, filling a critical knowledge gap for integrated pest and cover crop management.

• Guides cover crop selection by showing which species or mixes may increase or decrease lesion nematode pressure.
• Provides real-world yield and agronomic data alongside nematode population trends for each treatment.
• Helps farmers balance the benefits of cover crops (soil health, nutrient retention, weed suppression) with potential pest risks.
• Supports integrated nematode management strategies, potentially reducing hidden yield losses in soybean rotations.

• Nathan Schroeder, Associate Professor, University of Illinois
• Dane Hunter, Extension Specialist, Commercial Agriculture, University of Illinois
• Nathan Johanning – Illinois Extension Commercial Ag Educator, University of Illinois

• Belleville Research Center (Belleville, IL)
• Ewing Demonstration Center (Ewing, IL)

Dr. Nathan Schroeder
Associate Professor
University of Illinois Urbana-Champaign (UIUC)
217-244-6128
nes@illinois.edu