A simulation of grape powdery mildew development from a single infection point (x) in an untreated vineyard with 2 x 2 meter spacing between vines. This simulator lets us observe epidemic development and examine how well disease monitoring approaches perform (Mahaffee et al. 2022). 

Mahaffee WF, Margairaz F, Ulmer LD, Bailey BN, and Stoll R. 2022. Catching spores: Linking epidemiology, pathogen biology, and physics to ground-based airborne inoculum monitoring. Plant Disease 0 0:ja. DOI: 10.1094/PDIS-11-21-2570-FE