Raw dataset that supports the findings of the manuscript "Decision support systems reduce fungicide use by half compared to calendar-based strategies without increasing disease risk" Dataset includes the results of 80 independent experiments reported in 22 articles and it has a dimension of 329 rows x 42 columns. Further information in Description Supplementary Data.pdf file. This dataset was assembled including also the data from the publication Agronomy 2020, 10(4), 560; https://doi.org/10.3390/agronomy10040560.