RESEARCH

Management of Soybean Cyst Nematode and Sudden Death Syndrome with Nematode-Protectant Seed Treatments Across Multiple Environments in Soybean

Kaitlyn M. Bissonnette

^†Corresponding author: K. M. Bissonnette;

E-mail Address: [email protected]

https://orcid.org/0000-0001-5394-9031

Division of Plant Science and Technology, University of Missouri, Columbia, MO 65211, U.S.A.

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Jefferson Barizon

Division of Plant Science and Technology, University of Missouri, Columbia, MO 65211, U.S.A.

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Eric Adee

Department of Agronomy, Kansas State University, Topeka, KS 66618, U.S.A.

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Keith A. Ames

Department of Crop Science, University of Illinois, Urbana, IL 61801, U.S.A.

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Talon Becker

Department of Crop Science, University of Illinois, Urbana, IL 61801, U.S.A.

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Meghan Biggs

Division of Plant Science and Technology, University of Missouri, Columbia, MO 65211, U.S.A.

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Carl A. Bradley

https://orcid.org/0000-0002-8334-0750

Department of Plant Pathology, University of Kentucky, Princeton, KY 42445, U.S.A.

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Mariama Brown

Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, U.S.A.

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Emmanuel Byamukama

https://orcid.org/0000-0003-4914-5457

South Dakota State University, Brookings, SD 57007, U.S.A.

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Martin I. Chilvers

https://orcid.org/0000-0001-8832-1666

Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A.

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Travis R. Faske

https://orcid.org/0000-0002-5441-1775

Department of Entomology and Plant Pathology, University of Arkansas System, Lonoke, AR 72086, U.S.A.

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Chelsea J. Harbach

Department of Crop Science, University of Illinois, Monmouth, IL 61462, U.S.A.

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Tamra A. Jackson-Ziems

Department of Plant Pathology, University of Nebraska, Lincoln, NE 68583, U.S.A.

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Yuba R. Kandel

https://orcid.org/0000-0001-5234-5295

Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA 50011, U.S.A.

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Nathan M. Kleczewski

https://orcid.org/0000-0001-5671-6727

Department of Agronomy, Kansas State University, Topeka, KS 66618, U.S.A.

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Alyssa M. Koehler

https://orcid.org/0000-0002-9514-9910

Department of Plant and Soil Sciences, University of Delaware, Georgetown, DE 19947, U.S.A.

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Samuel G. Markell

https://orcid.org/0000-0003-1231-0826

Department of Plant Pathology, North Dakota State University, Fargo, ND 58102, U.S.A.

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Daren S. Mueller

Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA 50011, U.S.A.

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Daniel A. Sjarpe

Division of Plant Science and Technology, University of Missouri, Columbia, MO 65211, U.S.A.

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Damon L. Smith

https://orcid.org/0000-0003-3436-3718

Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI 53706, U.S.A.

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Darcy E. P. Telenko

https://orcid.org/0000-0003-0357-1493

Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, U.S.A.

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, and

Albert U. Tenuta

Ontario Ministry of Agriculture, Food, and Rural Affairs, Ridgetown, ON N0P2C0, Canada

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Affiliations

Authors and Affiliations

Kaitlyn M. Bissonnette¹^†
Jefferson Barizon¹
Eric Adee²
Keith A. Ames³
Talon Becker³
Meghan Biggs¹
Carl A. Bradley⁴
Mariama Brown⁵
Emmanuel Byamukama⁶
Martin I. Chilvers⁷
Travis R. Faske⁸
Chelsea J. Harbach⁹
Tamra A. Jackson-Ziems¹⁰
Yuba R. Kandel¹¹
Nathan M. Kleczewski²
Alyssa M. Koehler¹²
Samuel G. Markell¹³
Daren S. Mueller¹¹
Daniel A. Sjarpe¹
Damon L. Smith¹⁴
Darcy E. P. Telenko⁵
Albert U. Tenuta¹⁵

¹Division of Plant Science and Technology, University of Missouri, Columbia, MO 65211, U.S.A.
²Department of Agronomy, Kansas State University, Topeka, KS 66618, U.S.A.
³Department of Crop Science, University of Illinois, Urbana, IL 61801, U.S.A.
⁴Department of Plant Pathology, University of Kentucky, Princeton, KY 42445, U.S.A.
⁵Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, U.S.A.
⁶South Dakota State University, Brookings, SD 57007, U.S.A.
⁷Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A.
⁸Department of Entomology and Plant Pathology, University of Arkansas System, Lonoke, AR 72086, U.S.A.
⁹Department of Crop Science, University of Illinois, Monmouth, IL 61462, U.S.A.
¹⁰Department of Plant Pathology, University of Nebraska, Lincoln, NE 68583, U.S.A.
¹¹Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA 50011, U.S.A.
¹²Department of Plant and Soil Sciences, University of Delaware, Georgetown, DE 19947, U.S.A.
¹³Department of Plant Pathology, North Dakota State University, Fargo, ND 58102, U.S.A.
¹⁴Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI 53706, U.S.A.
¹⁵Ontario Ministry of Agriculture, Food, and Rural Affairs, Ridgetown, ON N0P2C0, Canada

Published Online:18 May 2024https://doi.org/10.1094/PDIS-02-23-0292-RE

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Abstract

As soybean (Glycine max) production continues to expand in the United States and Canada, so do pathogens and pests that directly threaten soybean yield potential and economic returns for farmers. One such pathogen is the soybean cyst nematode (SCN; Heterodera glycines). SCN has traditionally been managed using SCN-resistant cultivars and rotation with nonhost crops, but the interaction of SCN with sudden death syndrome (SDS; caused by Fusarium virguliforme) in the field makes management more difficult. Nematode-protectant seed treatments have become options for SCN and SDS management. The objectives of this study were to evaluate nematode-protectant seed treatments for their effects on (i) early and full season SCN reproduction, (ii) foliar symptoms and root-rot caused by SDS, and (iii) soybean yield across environments accounting for the above factors. Using a standard protocol, field trials were implemented in 13 states and one Canadian province from 2019 to 2021 constituting 51 site-years. Six nematode-protectant seed treatment products were compared with a fungicide + insecticide base treatment and a nontreated check. Initial (at soybean planting) and final (at soybean harvest) SCN egg populations were enumerated, and SCN females were extracted from roots and counted at 30 to 35 days postplanting. Foliar disease index (FDX) and root rot caused by the SDS pathogen were evaluated, and yield data were collected for each plot. No seed treatment offered significant nematode control versus the nontreated check for in-season and full-season nematode response, no matter the initial SCN population or FDX level. Of all treatments, ILEVO (fluopyram) and Saltro (pydiflumetofen) provided more consistent increases in yield over the nontreated check in a broader range of SCN environments, even when FDX level was high.

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