Botryosphaeria stevensii

Botryosphaeria stevensii is a fungal plant pathogen that causes cankers on several tree species including apple and juniper as well as black dead arm on grape. It causes branch dieback, possibly effecting a large portion of the tree canopy, and if severe it can kill entire plants. Prevention efforts may include careful selection of plants, including resistant cultivars, planting in well-draining loose soils, exposure to light and plant spacing to reduce moisture retention.[1]

Botryosphaeria stevensii
Scientific classification
Kingdom: Fungi
Division: Ascomycota
Class: Dothideomycetes
Order: Botryosphaeriales
Family: Botryosphaeriaceae
Genus: Botryosphaeria
Species:
B. stevensii
Binomial name
Botryosphaeria stevensii
Shoemaker, (1964)
Synonyms

Botryodiplodia malorum
Camarosporium mutilum
Diplodia mutila
Diplodia quercina
Diplodia quercus
Diplodia samararum
Dothiora mutila
Hyalothyridium mutilum
Macrophoma malorum
Metadiplodia mutila
Phoma malorum
Physalospora mutila
Sphaeria malorum
Sphaeria mutila
Sphaeropsis malorum

Oaks with canker, presumably caused by Botryosphaeria stevensii.

References
  1. "Ornamental Disease Facts". Ohio State University.


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