On-Farm Research Conference
Methods for Collecting Plant Disease Data
Alison E. Robertson
Department of Plant Pathology
Iowa State University
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The goal of collecting plant disease data is to assess if a particular practice affects disease development and consequently impacts yield. Since there can be many diseases affecting a crop in the test field, a target disease needs to be identified, and an assessment unit (leaf, stem, whole plant) decided upon. Depending upon the distribution of the disease in the field, different sampling patterns and designs can be used to most accurately quantify disease incidence and/or severity in the field.
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