''Sphaeropsis tumefaciens'' is an

ascomycete Ascomycota is a phylum of the kingdom Fungi that, together with the Basidiomycota, forms the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. It is the largest phylum of Fungi, with over 64,000 species. The defi ...

fungus that is a

plant pathogen Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomyc ...

infecting citruses.

References

External links

Index Fungorum

USDA ARS Fungal Database
Fungi described in 1911 Fungal citrus diseases Ascomycota enigmatic taxa {{fungus-fruit-disease-stub