Phyllosticta concava

Phyllosticta concava, also known as opuntia dry rot^[1] or prickly pear brown spot, is a species of fungus that infects opuntia cactus, leaving discolored circular depressions in the pads.^[2][3] The species was first formally described by the mycologist Fred Jay Seaver in 1922.

Phyllosticta concava
Saguaro National Park, Arizona, United States
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Dothideomycetes
Order:	Botryosphaeriales
Family:	Botryosphaeriaceae
Genus:	Phyllosticta
Species:	P. concava
Binomial name
Phyllosticta concava Seaver (1922)