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Ecology and diversity of culturable fungal species associated with soybean seedling diseases in the Midwestern United States.

  • Pimentel, Mirian F1
  • Srour, Ali Y2
  • Warner, Amanda J3
  • Bond, Jason P1
  • Bradley, Carl A4
  • Rupe, John5
  • Chilvers, Martin I6
  • Rojas, J Alejandro6
  • Jacobs, Janette L6
  • Little, Christopher R7
  • Robertson, Alison E8
  • Giesler, Loren J9
  • Malvick, Dean10
  • Wise, Kiersten11
  • Tenuta, Albert12
  • Fakhoury, Ahmad M1
  • 1 Department of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, USA.
  • 2 USDA, ARS, New England Plant, Soil, and Water Laboratory, Orono, Maine, USA.
  • 3 Syngenta Crop Protection, Raleigh-Durham, North Carolina, USA.
  • 4 Department of Plant Pathology, University of Kentucky Research and Educational Center, Princeton, Kentucky, USA.
  • 5 Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, Arkansas, USA.
  • 6 Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan, USA.
  • 7 Department of Plant Pathology, Kansas State University, Manhattan, Kansas, USA.
  • 8 Department of Plant Pathology and Microbiology, Iowa State University, Ames, Iowa, USA.
  • 9 Department of Plant Pathology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
  • 10 Department of Plant Pathology, University of Minnesota, Minneapolis, Minnesota, USA.
  • 11 Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana, USA. , (India)
  • 12 Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA), Ridgetown, Ontario, USA.
Published Article
Journal of Applied Microbiology
Wiley (Blackwell Publishing)
Publication Date
May 01, 2022
DOI: 10.1111/jam.15507
PMID: 35226387


To isolate and characterize fungi associated with diseased soybean seedlings in Midwestern soybean production fields and to determine the influence of environmental and edaphic factors on their incidence. Seedlings were collected from fields with seedling disease history in 2012 and 2013 for fungal isolation. Environmental and edaphic data associated with each field was collected. 3036 fungal isolates were obtained and assigned to 76 species. The most abundant genera recovered were Fusarium (73%) and Trichoderma (11.2%). Other genera included Mortierella, Clonostachys, Rhizoctonia, Alternaria, Mucor, Phoma, Macrophomina and Phomopsis. Most recovered species are known soybean pathogens. However, non-pathogenic organisms were also isolated. Crop history, soil density, water source, precipitation and temperature were the main factors influencing the abundance of fungal species. Key fungal species associated with soybean seedling diseases occurring in several US production regions were characterized. This work also identified major environment and edaphic factors affecting the abundance and occurrence of these species. The identification and characterization of the main pathogens associated with seedling diseases across major soybean-producing areas could help manage those pathogens, and devise more effective and sustainable practices to reduce the damage they cause. © 2022 The Authors. Journal of Applied Microbiology published by John Wiley & Sons Ltd on behalf of Society for Applied Microbiology.

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