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Soybean Cyst Nematode Reduces Soybean Yield Without Causing Obvious Aboveground Symptoms
Plant Disease
  • J. Wang, University of Missouri
  • T. L. Niblack, University of Missouri
  • J. A. Tremain, University of Missouri
  • W. J. Wiebold, University of Missouri
  • G. L. Tylka, Iowa State University
  • C. C. Marett, Iowa State University
  • G. R. Noel, United States Department of Agriculture
  • O. Myers, Southern Illinois University Carbondale
  • M. E. Schmidt, Southern Illinois University Carbondale
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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.

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.

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.
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J. Wang, T. L. Niblack, J. A. Tremain, W. J. Wiebold, et al.. "Soybean Cyst Nematode Reduces Soybean Yield Without Causing Obvious Aboveground Symptoms" Plant Disease Vol. 87 Iss. 6 (2003) p. 623 - 628
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