2020
Efficacy of seed treatments to manage soilborne pathogens of soybean
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Contributor/Checkoff:
Maryland Soybean Board
Category:
Sustainable Production
Keywords:
NematodePest
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Alyssa Koehler, University of Delaware
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Maryland Soybean Board
$5,878
Institution Funded:
University of Delaware
$5,878
Brief Project Summary:

As we continue to deal with breakdown of resistance gene efficacy and subsequent increases in soybean cyst nematode populations, the goal of this project is to obtain data on performance of nematicide seed treatment products to help farmers make informed decisions regarding SCN management tools. This project tests two seed treatments to compare yield advantages over a non-treated control and to examine the effect of seed treatments on nematode populations over the course of the season. It also focuses on diseases of soybeans along with soil samples to provide insight on the nematode species present and their relative abundance among plots following seed treatments.

Key Benefactors:
farmers, agronomists, Extension agents

Information And Results
Final Project Results

Update:

View uploaded report PDF file

Soybean cyst nematode (SCN) (Heterodera glycines) is consistently ranked among the top destructive soybean pathogens across the United States and is the most significant nematode pest affecting soybeans in Delaware and the Eastern Shore of Maryland. SCN has been present in Delaware since 1979 prompting growers to rely on resistant varieties, primarily using the PI88788 resistance source. However, additional control strategies are needed as SCN populations have begun reproducing readily on these once resistant cultivars. A five-replication field trial was conducted in 2020 to evaluate two soybean nematicide seed treatments, ILEVO (fluopyram) and Saltro (pydiflumetofen), compared to non-treated plain seed, for stand emergence, control of SCN, and yield differences. Both seed treatments increased speed and percent of germination. Saltro treated plants yielded the highest, at 36.4 bushels per acre, but there were no statistically significant yield differences among treatments. In this trial, Saltro was the most effective at reducing cysts per plant and had the lowest numerical SCN populations at the end of the season. Further replications of this experiment will be conducted in 2021 to confirm preliminary results.

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.