Relationship between Sudden Death Syndrome caused by Fusarium virguliforme and Soybean Yield: A Meta-Analysis

Yuba R. Kandel, Carl A. Bradley, Martin I. Chilvers, Febina M. Mathew, Albert U. Tenuta, Damon L. Smith, Kiersten A. Wise, Daren S. Mueller

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In total, 52 uniform field experiments were conducted in Illinois, Indiana, Iowa, Michigan, South Dakota, and Wisconsin in the United States and Ontario, Canada from 2013 to 2017 comparing crop protection products against sudden death syndrome (SDS) of soybean. Data were analyzed using meta-analytic models to summarize the relationship between foliar disease index (FDX) and yield. For each study, correlation and regression analyses were performed separately to determine three effect sizes: Fisher’s transformation of correlation coefficients (Zr), intercept (b0), and slope (b1). Random- and mixed-effect meta-analyses were used to summarize the effect sizes. Study- and location-specific moderator variables FDX (low < 10% and high $ 10%), date of planting (early = prior to 7 May, conventional = 7 to 21 May, and late = after 21 May) cultivar (susceptible and partially resistant to SDS), study location, and growing season were used as fixed effects. The overall mean effect sizes of transformed correlation coefficient Zr was −0.41 and different from zero (P < 0.001), indicating that yield was negatively correlated with FDX. The Zr was affected by disease level (P < 0.01) and cultivar (P = 0.02), with a greater effect at higher disease levels and with susceptible cultivars. The mean b0 was 4,121 kg/ha and mean b1 was −21 kg/ha/% FDX and were different from zero (P < 0.01). Results from these data indicate that, for every unit of FDX increase, yield was decreased by 0.5%. Study locations and year affected the b0, whereas none of the moderator variables significantly affected b1..

Original languageEnglish
Pages (from-to)1736-1743
Number of pages8
JournalPlant Disease
Issue number6
StatePublished - Jun 2020

Bibliographical note

Funding Information:
Partial funding for field research in the United States was available by soybean checkoff through the North Central Soybean Research Program and United Soybean Board, Bayer CropScience, and BASF. In Canada, the Grain Farmers of Ontario, which obtained funding through the Ontario Farm Innovation Program, a component of Growing Forward 2, provided partial funding for field research.

Publisher Copyright:
© 2020 The American Phytopathological Society


  • Correlation
  • Economic impacts
  • Field crops
  • Fungi
  • Oilseeds and legumes
  • Regression
  • Sudden death syndrome
  • Yield loss

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science


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