Data from 89 fungicide trials on apple scab across Europe 2008-2018

The data set comprises records of disease incidence and yield from untreated and treated plots. Assessments The disease infection was expressed as the intensity of attack (=severity) and/or the frequency of attack. Two assessment methods were used: 1. Visual assessment: • P%INF: intensity of attack was obtained as a visual estimation of the percentage of each plant part (leaves or fruits) affected by disease • P%FREQ: frequency of attack was represented by the number of infected leaves or fruits. The frequency is expressed as a percentage of the number sampled. 2. Class assessment The level of the attack (intensity and frequency) was evaluated and calculated by classing plants into different severity categories ranging from no disease to severe attack. • BEFHKT: frequency of disease attack expressed as a percentage, considering 4 damage classes • BEFWER: intensity of attack expressed as a percentage, considering 4 damage classes. BEFHKT = 100*(cl2 + cl3 + cl4)/(cl1 + cl2 + cl3 + cl4) BEFWER = 100*(cl2 + 2*cl3 + 3*cl4)/(3*N) (the Townsend-Heuberger intensity of attck) Table of measures Measure Description P%FREQ Estimated frequency of attack % P%INF Estimated severy of attack % %ANTK1 Class 1 (%) %ANTK2 Class 2 (%) %ANTK3 Class 3 (%) %ANTK4 Class 4 (%) BEFHKT Frequency of attack BEFWER Index of attack INFECT Infection (F); Infestation (F) KR%ABB Diseased (%) WIRKGR Percent of untreated Data format and source The data is provided as both a tab-separated text file and a binary R data file. The R files provides code to read and plot the data. The plot produced is also provided as a PNG file. The field trials were conducted by BASF, Germany.