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.
Highlights
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
The disease is caused by the plant-pathogenic bacterium Erwinia psidii (RODRIGUES NETO et al, 1983), which colonizes the xylem vessels and parenchymal intercellular spaces (CHAI et al, 2017; CAIRES et al, 2020)
Disease quantification is based on visual observation, which makes the disease assessment inaccurate and/or imprecise and might lead to faulty conclusions being drawn from the data
Summary
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. Accuracy and precision of the estimates by each rater, with and without the SAD, were determined based on Lin’s concordance correlation coefficient.
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