Diseases
Leaf Spot of American plum, goose plum
Prunus americana Marsh.
A collective term for symptoms of bacterial and fungal infection in Prunus americana, manifesting as necrotic spots, shot-hole symptoms, and premature defoliation.
In the reference 4 varieties crop American plum, where this is mentioned in the description.
Bacterial spot, caused by Xanthomonas arboricola pv. pruni, manifests as small water-soaked spots that eventually darken and become angular. A characteristic sign is the shot-hole effect, resulting from the shedding of necrotic leaf tissue, often accompanied by chlorosis.
Fungal infections on American plum include cherry leaf spot, caused by the pathogen Blumeriella jaapii, as well as anthracnose, caused by fungi of the genus Colletotrichum. These pathogens trigger spotting and premature foliage drop, although specific resistance genes for the species are not described in the literature.
General information about the subject — on the page Leaf spot diseases.
Varieties of American plum mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
No varieties yet.