Spatial patterns of plant disease provide important information about pathogen source, spread and reproduction. Using point pattern analysis, Everhart et al. generate detailed three-dimensional maps of different symptom types of brown rot (Monilinia laxa) in sour cherry tree (Prunus cerasus) canopies to characterize symptom aggregation and association. This mapping and analysis framework, which quantitatively supports the importance of twig cankers as an inoculum source within individual trees, should be applicable to many fields of canopy research.
