Soybean cyst nematode (SCN) continues to adapt and become increasingly tolerant to SCN-resistant soybean varieties. Most varieties contain the same source of SCN-resistance, which has been utilized for more than three decades. This leads to questions such as:

  1. How effective are other relied upon SCN management strategies?
  2. What management tactics might be coming down the pipeline?

We will discuss findings from seed treatment experiments, on-farm strip trial studies, on-farm sampling efforts, and some cereal rye cover crop data. We will also discuss advances in SCN-resistance breeding efforts.

Dr. Mandy Bish is an Extension Specialist at the University of Missouri (MU). She currently coordinates MU’s Integrated Pest Management (IPM) program, serves as the lead for MU’s Extension Field Crop Pathology Team, and directs MU’s SCN Diagnostics, which analyzes approximately 2,800 samples annually. Mandy is a Missouri native. She grew up on a farm operation in mid-Missouri and earned her B.S. in Plant Sciences at MU. She then earned her Ph.D. in Cell Biology and Molecular Genetics at the University of Maryland in 2009. Mandy worked as a research molecular biologist at the USDA-ARS Foreign Disease and Weed Science Research Unit at Fort Detrick, Maryland before returning to her Missouri roots. She has worked at the University of Missouri since 2014 where she has studied row crops and pests. She can be contacted at or 573-882-9878.

This presentation was featured at the Quincy Better Beans event on January 25, 2023.

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About the Author: Kelsey Litchfield

Kelsey Litchfield is the Agronomic Outreach Specialist for the Illinois Soybean Association. In her role, she manages ILSoyAdvisor media platforms and assists the agronomy team with events and field days. A native of Rio, IL, Kelsey earned her bachelor’s degree from University of Illinois Urbana-Champaign in 2017 where she double majored in Agricultural Communications and Broadcast Journalism.

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