Tropical Plant Pathology

, Volume 44, Issue 1, pp 104–111 | Cite as

Within-field variability and spatial analysis of white mould and soybean crop attributes in southern Brazil

  • Carlos R. Wutzki
  • Ayrton Berger-Neto
  • Edilaine M. Grabicoski
  • Luciane Henneberg
  • Felipe F. Sartori
  • David S. Jaccoud-FilhoEmail author


White mould (Sclerotinia sclerotiorum) is a damaging disease of soybean crops in Brazil. Within-field spatial analyses of white mould disease and inoculum, as well as yield components at the field level may provide insights into their relationship, but this information is lacking in the country. During three years, spatially explicit within-field data on white mould and soybean stand and yield were measured at three fields, with sizes ranging from 4 to 12 ha, located in the Campos Gerais region of Paraná State, Brazil and all naturally infested with sclerotia. Crop stand, white mould incidence and severity, soybean yield and sclerotia collected at harvest were assessed in quadrats of 7.2 m2 distant from each other by 8 to 50 m. Soilborne sclerotia were counted in four quadrats (0.25 m2 and 0.05 m depth) at each sampling point. The semivariograms fitted the pure nugget effect, linear, spherical, and exponential models. The pure nugget model best fitted sclerotia data, suggesting a random distribution. Significant and positive associations were found between disease incidence and sclerotia amount at harvest, which were both negative associated with yield.


Glycine max Sclerotinia sclerotiorum Incidence Sclerotia Semivariograms Severity Plant attributes 


Supplementary material

40858_2018_272_MOESM1_ESM.docx (19 kb)
ESM 1 (DOCX 19 kb)


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Copyright information

© Sociedade Brasileira de Fitopatologia 2019

Authors and Affiliations

  • Carlos R. Wutzki
    • 1
  • Ayrton Berger-Neto
    • 1
  • Edilaine M. Grabicoski
    • 1
    • 2
  • Luciane Henneberg
    • 1
  • Felipe F. Sartori
    • 1
    • 3
  • David S. Jaccoud-Filho
    • 1
    Email author
  1. 1.Departamento de Fitotecnia e FitossanidadeUniversidade Estadual de Ponta GrossaPonta GrossaBrazil
  2. 2.Departamento de AgronomiaUniversidade Estadual de MaringáMaringáBrazil
  3. 3.Departamento de Produção Vegetal, Escola Superior de Agricultura “Luiz de Queiroz”Universidade de São PauloPiracicabaBrazil

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