Campus Units

Agronomy, Plant Pathology and Microbiology

Document Type

Article

Publication Version

Published Version

Publication Date

9-2018

Journal or Book Title

Plant Disease

Volume

102

Issue

9

First Page

1748

Last Page

1758

DOI

10.1094/PDIS-11-16-1660-RE

Abstract

Current management of sudden death syndrome (SDS) of soybean, caused by Fusarium virguliforme, focuses on planting resistant varieties and improving soil drainage; however, these measures are not completely effective. A 6-year study evaluated the effects of cropping system diversification on SDS and soybean yield. SDS, root health, yield, and F. virguliforme density in soil were assessed in a naturally infested field trial comparing a 2-year cropping system consisting of a corn-soybean rotation and synthetic fertilizer applications with 3- and 4-year cropping systems consisting of corn-soybean-oat + red clover and corn-soybean-oat +alfalfa-alfalfa rotations, respectively, with both manure and low synthetic fertilizer rates. In 5 of 6 years, SDS incidence and severity were lower and yield higher in the 3- and 4-year systems than in the 2-year system. SDS severity and incidence were up to 17-fold lower in the diversified systems than in the 2-year system. Incidence and severity of SDS explained 45 to 87% of the variation in yield. Plants in the 2-year system generally showed more severe root rot and lower plant weights than plants in the diversified systems. F. virguliforme density in soil was up to fivefold greater in the 2-year system compared with the 4-year system. The processes responsible for the suppression of SDS and yield protection in the diversified cropping systems still need to be determined.

Comments

This article is published as Leandro, Leonor FS, Sharon Eggenberger, Chiliang Chen, Jeffrey Williams, Gwyn A. Beattie, and Matt Liebman. "Cropping System Diversification Reduces Severity and Incidence of Soybean Sudden Death Syndrome Caused by Fusarium virguliforme." Plant Disease 102 (2018):1748. doi: 10.1094/PDIS-11-16-1660-RE. Posted with permission.

Copyright Owner

The American Phytopathological Society

Language

en

File Format

application/pdf

Available for download on Sunday, September 01, 2019

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