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Estimating Disease Severity and Incidence

  • Chapter
Epidemiology and Management of Root Diseases

Abstract

Disease assessment is one of the most challenging tasks in working with plant diseases. A diseased plant or group of diseased plants is often recognized easily once symptoms or signs become visible; however, it is the quantification of the disease that presents the challenge. The assessment of disease incidence (i.e., the number or proportion of diseased plants in a population) is an apparently simple counting task, but is subject to the usual limitations of interpretation related to sample size. The accurate and precise estimation or measurement of disease severity (i.e., the area or proportion of plant tissue that is symptomatic) can be a formidable task because of visual and measurement errors and the need for samples to be representative of the area considered and to be of adequate number.

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  1. C. L. Campbell
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  2. D. A. Neher
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Campbell, C.L., Neher, D.A. (1994). Estimating Disease Severity and Incidence. In: Epidemiology and Management of Root Diseases. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85063-9_5

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  • DOI: https://doi.org/10.1007/978-3-642-85063-9_5

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-85065-3

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