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

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

References

1. Pirone, Pascal P. (1978-03-14). Diseases and Pests of Ornamental Plants. John Wiley & Sons. ISBN 978-0-471-07249-2.
2. Grant, Bonnie L. (2017-04-13). "Prickly Pear Leaf Spot: Treatment For Phyllosticta Fungus In Cactus". gardeningknowhow. Retrieved 2024-03-16.
3. Kempken, F. (2002-06-12). Agricultural Applications. Springer Science & Business Media. p. 137. ISBN 978-3-540-42628-8.

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