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Environmental and Edaphic Factors that Influence Spring Dead Spot Epidemics.

W J Hutchens1, C A Henderson1, C M Straw2

  • 1School of Plant and Environmental Sciences, Virginia Polytechnic Institute, 675 Old Glade Road, Blacksburg, VA 24060.

Phytopathology
|June 19, 2023
PubMed
Summary
This summary is machine-generated.

Spring dead spot (SDS) is a turfgrass disease. Edaphic factors like soil pH and thatch depth can influence SDS epidemics, but no single factor was consistently linked to its occurrence in this study.

Keywords:
bermudagrassdiseaseepidemiologyspring dead spotturfgrass

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Area of Science:

  • Plant Pathology
  • Soil Science
  • Turfgrass Management

Background:

  • Spring dead spot (SDS), caused by *Ophiosphaerella* spp., affects warm-season turfgrasses during winter dormancy.
  • The specific soil (edaphic) factors driving SDS epidemics are not well understood.

Purpose of the Study:

  • To investigate the relationship between edaphic factors and SDS development in 'TifSport' hybrid bermudagrass.
  • To identify key soil conditions influencing SDS intensity on golf course fairways.

Main Methods:

  • Aerial imagery from drones was used to map SDS intensity zones (low, moderate, high).
  • Soil samples, firmness, thatch depth, and organic matter were measured in 120 plots across four fairways.
  • Multivariate correlation and stepwise regression analyses identified influencing edaphic factors.

Main Results:

  • Edaphic factors associated with increased SDS varied significantly between fairways and years.
  • Soil pH and thatch depth were identified as potential predictors for SDS in some instances.
  • No single edaphic factor consistently correlated with SDS occurrence across all conditions.

Conclusions:

  • This foundational study highlights the complex and variable nature of edaphic factors in SDS development.
  • Results provide a basis for future research to better predict and manage SDS epidemics.
  • Understanding these relationships can guide targeted management strategies for turfgrass health.