caa a22 4500 467929580 CHVBK 20180406152939.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s10658-005-1230-z doi (NATIONALLICENCE)springer-10.1007/s10658-005-1230-z Disease Assessment Concepts and the Advancements Made in Improving the Accuracy and Precision of Plant Disease Data [Elektronische Daten] [Forrest Nutter Jr, Paul Esker, Rosalee Netto] New concepts in phytopathometry continue to emerge, such as the evolution of the concept of pathogen intensity versus the well-established concept of disease intensity. The concept of pathogen severity, defined as the quantitative measurement of the amount of pathogen per sampling unit has also emerged in response to the now commonplace development of quantitative molecular detection tools. Although the concept of disease severity, i.e., the amount of disease per sampling unit, is a well-established concept, the accuracy and precision of visual estimates of disease severity is often questioned. This article will review disease assessment concepts, as well as the methods and assessment aides currently available to improve the accuracy and precision of visually-based disease severity data. The accuracy and precision of visual disease severity assessments can be improved by quantitatively measuring and comparing the accuracy and precision of rates and/or assessment methods using linear regression, by using computer-based disease assessment training programmes, and by developing and using diagrammatic keys (standard area diagrams). Springer, 2006 phytopathometry nationallicence Nutter Jr Forrest Department of Plant Pathology, Iowa State University, 351 Bessey Hall, 50011, Ames, IA, USA aut Esker Paul Department of Plant Pathology, Iowa State University, 351 Bessey Hall, 50011, Ames, IA, USA aut Netto Rosalee National Research Institute of the Amazon, Caixa Postal 478, CEP 69011-670, Manaus, AM, Brazil aut European Journal of Plant Pathology Kluwer Academic Publishers 115/1(2006-05-01), 95-103 0929-1873 115:1<95 2006 115 10658 https://doi.org/10.1007/s10658-005-1230-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10658-005-1230-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nutter Jr Forrest Department of Plant Pathology, Iowa State University, 351 Bessey Hall, 50011, Ames, IA, USA aut NATIONALLICENCE 700 1- Esker Paul Department of Plant Pathology, Iowa State University, 351 Bessey Hall, 50011, Ames, IA, USA aut NATIONALLICENCE 700 1- Netto Rosalee National Research Institute of the Amazon, Caixa Postal 478, CEP 69011-670, Manaus, AM, Brazil aut NATIONALLICENCE 773 0- European Journal of Plant Pathology Kluwer Academic Publishers 115/1(2006-05-01), 95-103 0929-1873 115:1<95 2006 115 10658 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer