2018
SCN Coalition: Monitoring Populations in Ohio
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Contributor/Checkoff:
Ohio Soybean Council
Category:
Sustainable Production
Keywords:
NematodePest
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Anne Dorrance, The Ohio State University
Co-Principal Investigators:
Project Code:
18-R20
Contributing Organization (Checkoff):
Ohio Soybean Council
$80,000
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 Sample bags were given to producers via mail and 1,000 were prepared for Farm Science Review. Additionally, sample bags were given to county educators at a training in December. We processed the samples at two locations, in the Niblack lab in Columbus and the Dorrance lab in Wooster. For the first report in July 2018 we had received 83 samples from 22 counties in total (July 1) By December we received 238 samples from 37 counties in total and all were processed and the numbers have been reported back to the person who submitted the sample. SCN Population Level (eggs/100 cc) Total fields % processed None Detected 89 37.4 Trace (40-200) 58 24.4 Low (200-2000) 58 24.4 Moderate (2000-5000) 22 9.2 High (5000 +) 11 4.6 Objective 2. 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. In the past 3 months • 30 populations were increased under greenhouse conditions. • 8 populations are currently in SCN Type greenhouse test 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. Fall soil samples were collected to assess preliminary SCN population numbers and analysis is in process. 2. Field experiments at 3 locations with high SCN populations were finally harvested to evaluate Seed treatment nematicides. Processing of soil samples was completed for some locations. One is still in progress, and analysis. Additional information: 1. Dorrance, Ralston, and Winger all participated in the SCN Coalition Meeting held in St. Louis MO on Nov 6-8th. Excellent discussion and planning for the 2019 season.

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.