2019
SCN Coalition: Monitoring Populations in Ohio
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Contributor/Checkoff:
Ohio Soybean Council
Category:
Sustainable Production
Keywords:
NematodePest
Parent Project:
SCN Coalition: Monitoring Populations in Ohio
Lead Principal Investigator:
Anne Dorrance, The Ohio State University
Co-Principal Investigators:
Project Code:
19-R-25
Contributing Organization (Checkoff):
Ohio Soybean Council
$80,000
Leveraged Funding (Non-Checkoff):
Additional funding was leveraged from 4 companies in 2019 to evaluate the efficacy of seed treatments towards SCN. Two companies have interest in projects during 2020.
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Institution Funded:
The Ohio State University
$80,000
Brief Project Summary:

Soybean cyst nematode is adapting to the most commonly deployed resistance derived from PI 88788. This project supports soil sampling that arises from an education campaign from the SCN Coalition to raise awareness of this issue. The project aims to monitor soybean cyst nematode populations in Ohio for the number of eggs/sample, to determine which source of resistance for SCN, Peking or PI 88788, will be most effective across Ohio, and to evaluate additional management practices that limit the impact of soybean cyst nematode in Ohio.

Key Benefactors:
farmers, agronomists, extension agents

Information And Results
Final Project Results

Update:
Objective 1. We have received 300 samples during 2019 to date. With another 16 in February. These are still pending so the numbers below have not changed.

The samples from objective 1 that have egg counts higher than 500 eggs/100 cc of soil will be moved into the greenhouse screen to determine the SCN type. Populations of SCN will first be increased on Williams 82. Test lines [PI548402 (Peking), PI88788, and PI437654] and positive controls (Lee74, Williams 82) will be inoculated with 2500 eggs/second stage juveniles to determine relative virulence.

Table 2. Completed SCN Type Tests – March 2020– Summary of completed populations
41 populations completed to date. Of these Peking was resistant to 20 populations while PI 88788 still had high levels of resistant (<10% of susceptible control) to only 5 populations. Additionally, 24 of the populations could reproduce on PI 88788 at levels of 30 to 60% of the susceptible. These levels can cause measurable declines in yield based on studies in Iowa.

Objective 3.
Several different SCN management studies are in progress.
1. A study that is evaluating if Rye has any influence on SCN populations was planted again for the third year with a cover crop.
a. Spring soil sampling and processing was completed.
b. Data analysis is in progress
c. Note – this field was passed to Laura Lindsey
2. Field experiments at 2 locations with high SCN populations were established, data for SCN populations at planting, at harvest, stand counts and ratings for Sudden death syndrome was collected. Harvest at both sites was completed and data was sent to companies. Final counts of SCN populations are still in progress. Planning is in progress for SCN studies at Western for the 2020 season.


View uploaded report Word file

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.