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Table 2 An improved 16-class quantitative ordinal scale for general assessment of plant disease severity based on the scale developed by Chiang et al. (2014)

From: From visual estimates to fully automated sensor-based measurements of plant disease severity: status and challenges for improving accuracy

Ordinal equivalentMidpointSeverity (% range)
0
10.050+ to 0.1
20.300.1+ to 0.5
30.750.5+ to 1.0
41.501.0+ to 2.0
53.502.0+ to 5.0
67.505.0+ to 10.0
715.010.0+ to 20.0
825.020.0+ to 30.0
935.030.0+ to 40.0
1045.040.0+ to 50.0
1155.050.0+ to 60.0
1265.060.0+ to 70.0
1375.070.0+ to 80.0
1485.080.0+ to 90.0
1595.090.0+ to 100.0
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