''Gnomonia leptostyla'' is a fungal

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 ...

. It is newly named '' Ophiognomonia leptostyla'' and occurs on walnut ('' Juglans'' spp.) and causes leaf blotch and leaf spots which is called walnut anthracnose or walnut black spot. The

anamorph In mycology, the terms teleomorph, anamorph, and holomorph apply to portions of the life cycles of fungi in the phyla Ascomycota and Basidiomycota: *Teleomorph: the sexual reproductive stage (morph), typically a fruiting body. *Anamorph: an ase ...

is ''Marssoniella juglandis''.

References

External links

Index Fungorum

USDA ARS Fungal Database
Fungal tree pathogens and diseases Nut tree diseases Gnomoniaceae Fungi described in 1815 {{fungus-tree-disease-stub