SCN Race Testing
Sustainable Production
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Katherine Drake Stowe, US Soybean Research Collaborative
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:

Soybean cyst nematode is one of the most yield-impacting pests in North Carolina soybeans. The level of host resistance varieties currently offer is unclear due to the lack of knowledge of cyst races present. The primary goal of this research is to gather additional data to identify percentage of race by classification and across multiple soybean-producing counties. This allows soybean growers to determine if host resistance provides adequate control, or if they need other options like long-term rotation, soil fumigation or nematicides. This work aims to identify races present, including locations where SCN has been recently discovered, and determine which control practices are necessary for successful management.

Key Beneficiaries:
#agronomists, #extension agents, #farmers
Unique Keywords:
#nematode, #nematode, #nematodes, #scn, #SCN, #soybean cyst nematode, #soybean cyst nematode
Information And Results
Final Project Results

Based on the data generated from 30 samples in 2017, race 2 (~87%) was the predominant race, followed by race 5 (~10%) and race 4 (~3%). Based on the data generated from 46samplesin 2018, race 2 (~80%) was the predominant race followed by race 5 (~9%), race 1(~9%), and race 4 (~2%). When data is combined from both years of the study there were a combined 76 samples, race 2 (83%) was the predominant race followed by race 5 (9%), race 1, (5%), and race 4 (1%). Currently, there appear to be no trends in regard to soybean cyst nematode race and geographical region of the state. Findings suggest that host resistance currently available to producers may not adequately manage current races unless varieties resistant to the above races become available. Data supports that rotations with a non-host crop or chemical treatment remain viable options to effectively manage soybean cyst nematode.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.