Brown Patch Disease
Rhizoctonia solani · Family Ceratobasidiaceae · Updated October 2026
468US records
35states
Sepbusiest month
468 US records since 1898 (6 in the last 10 years)
Last seen Jun 17, 2019 (about 7 years ago) near Wightmans Grove, Sandusky County, OH, a preserved specimen in EUKARYOME: the rRNA gene reference database for identification of eukaryotes. Most US records come from Kansas, New York and Maryland, and the busiest months are Sep, Oct and Jul. (Data as of October 26, 2026; records can lag by weeks.)
⚠ Never eat a wild mushroom based on this site. We show where fungi have been recorded, nothing more. We never say any mushroom is edible or safe, and you shouldn't decide that from any website, app or photo. Many deadly mushrooms look like harmless ones. If someone may have eaten a wild mushroom, call Poison Control at 1-800-222-1222 right away.
Lookalike warning. Many mushrooms, including deadly ones, closely resemble each other, and the only reliable identification comes from an expert looking at the actual specimen (often with spore prints or microscopy). Never use a name, photo or record count on this page to decide what something is.
When it's recorded
Records by month, all years. Busiest: Sep, Oct, Jul.
Where it's recorded
Top counties
- Wabaunsee County, KS (139) · latest Oct 18, 2006
- Prince George's County, MD (41) · latest Aug 11, 1970
- Alachua County, FL (16) · latest 1947-08
- New York County, NY (16)
- South Central Connecticut Planning Region, CT (15) · latest Jan 29, 1931
- Dane County, WI (14) · latest Jul 19, 1966
- Champaign County, IL (12) · latest Aug 2, 1965
- Tompkins County, NY (11) · latest 1966-04
- Capitol Planning Region, CT (9) · latest 1939-09
- Ontario County, NY (7) · latest Aug 9, 1967
More on this species from GBIF.
Bring along
🍄
Regional mushroom field guideSee on Amazon🍄
Folding mushroom knife with brushSee on Amazon🍄
Wicker foraging basketSee on Amazon🍄
10x hand lens / loupeSee on Amazon🍄
Spore print paperSee on AmazonAs an Amazon Associate we earn from qualifying purchases.