Development and validation of a standard area diagram set to aid estimation o…

A standard area diagram (SAD) set to aid assessment of bacterial spot (caused by Xanthomonas spp.) severity on tomato (Solanum lycopersicum L.) leaves was prepared and evaluated for improving accuracy, precision and reliability of visual estimates. The proposed SAD set contains illustrations of leaves with 12 distinct disease severity values from 0.5 to 90 %, and was validated by 12 raters with…