A standard area diagram set for assessing severity of eucalyptus bacterial blight caused by Erwinia psidii

  • Borges Junior N
  • Capucho A
  • Lanna Filho R
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Abstract

ABSTRACT This study aimed to develop and validate a standard area diagram (SAD) set to estimate the severity of bacterial blight of eucalyptus caused by Erwinia psidii. For this purpose, an eight-level SAD was developed and validated by ten inexperienced raters. Accuracy and precision of the estimates by each rater, with and without the SAD, were determined based on Lin’s concordance correlation coefficient. The proposed SAD improved the accuracy and precision of the estimates. The SAD set studied here is a useful tool in assessments of bacterial blight of eucalyptus for epidemiological research and breeding programs.RESUMO Este trabalho objetivou o desenvolvimento de uma escala para estimar a severidade da seca-de-ponteiros do eucalipto causada por Erwinia psidii. Para isso, uma escala de oito níveis foi desenvolvida e validada por dez avaliadores inexperientes. A acurácia e precisão das estimativas de cada avaliador, com e sem a escala, foram determinadas baseadas no coeficiente de correlação concordante de Lin. A escala proposta melhorou a acurácia e a precisão das estimativas. A escala estudada se mostrou uma ferramenta útil na avaliação da seca-de-ponteiros do eucalipto para estudos epidemiológicos e em programas de melhoramento.

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APA

Borges Junior, N., Capucho, A. S., & Lanna Filho, R. (2020). A standard area diagram set for assessing severity of eucalyptus bacterial blight caused by Erwinia psidii. Arquivos Do Instituto Biológico, 87. https://doi.org/10.1590/1808-1657000832019

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