Campus Units

Plant Pathology and Microbiology

Document Type

Article

Publication Version

Published Version

Publication Date

6-2003

Journal or Book Title

Plant Disease

Volume

87

Issue

6

First Page

623

Last Page

628

DOI

10.1094/PDIS.2003.87.6.623

Abstract

Field experiments were conducted at locations in northern and southern Illinois, central Iowa, and central Missouri from 1997 to 1999 to investigate the effects of Heterodera glycines on soybean growth, development, and yield. A wide range of infestation levels was present at all locations. Two locally adapted cultivars, one resistant to H. glycines, were grown at each location. Cultivars were planted in alternating four-row strips with 76 cm between rows. For each cultivar, 20 1-m-long single-row plots were sampled every 2 weeks starting 4 weeks after planting. Infection by H. glycines reduced plant height and leaf and stem weight on the resistant cultivars in the first 12 weeks after planting, and delayed pod and seed development 12 to 14 weeks after planting. Biomass accumulation was not reduced on the susceptible cultivars until 10 weeks after planting; reduction in pod and seed development occurred throughout the reproductive stages. Susceptible cultivars produced significantly lower yields than resistant cultivars, but the yield reductions were not accompanied by visually detectable symptoms.

Comments

This article is published as Wang, J., T. L. Niblack, J. A. Tremain, W. J. Wiebold, G. L. Tylka, C. C. Marett, G. R. Noel, O. Myers, and M. E. Schmidt. "Soybean cyst nematode reduces soybean yield without causing obvious aboveground symptoms." Plant Disease 87, no. 6 (2003): 623-628, doi: 10.1094/PDIS.2003.87.6.623.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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