The theoretical basis and practical application of relationships between different disease intensity measurements in plants

N. McRoberts; G. Hughes; L. V. Madden

doi:10.1111/j.1744-7348.2003.tb00242.x

The theoretical basis and practical application of relationships between different disease intensity measurements in plants

N. McRoberts^*, G. Hughes, L. V. Madden

^*Corresponding author for this work

Research output: Contribution to journal › Review article › peer-review

90 Citations (Scopus)

Abstract

The literature concerning relationships among different measures of plant disease intensity is reviewed. Some previous confusion over the definition of the terms "incidence" and "severity" is noted and clarified. The review highlights the common features of relationships between incidence and severity, incidence and disease density, and incidence at pairs of scales in a spatial hierarchy. These relationships often show a similar saturation curve form that can frequently be described empirically using the complementary log-log transformation. A catalogue of alternative functional forms is provided. Practical applications in varietal evaluation are discussed.

Original language	English
Pages (from-to)	191-211
Number of pages	21
Journal	Annals of Applied Biology
Volume	142
Issue number	2
DOIs	https://doi.org/10.1111/j.1744-7348.2003.tb00242.x
Publication status	Published - 2003
Externally published	Yes

Keywords

Disease density
Disease models
Epidemiology
Incidence-severity relationship
Plant disease
Spatial scales

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10.1111/j.1744-7348.2003.tb00242.x

Cite this

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AB - The literature concerning relationships among different measures of plant disease intensity is reviewed. Some previous confusion over the definition of the terms "incidence" and "severity" is noted and clarified. The review highlights the common features of relationships between incidence and severity, incidence and disease density, and incidence at pairs of scales in a spatial hierarchy. These relationships often show a similar saturation curve form that can frequently be described empirically using the complementary log-log transformation. A catalogue of alternative functional forms is provided. Practical applications in varietal evaluation are discussed.

KW - Disease density

KW - Disease models

KW - Epidemiology

KW - Incidence-severity relationship

KW - Plant disease

KW - Spatial scales

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EP - 211

JO - Annals of Applied Biology

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IS - 2

ER -

The theoretical basis and practical application of relationships between different disease intensity measurements in plants

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Keywords

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