Rhizoctonia praticola (Kotila) O’Donnell, R. P., Linde, C. C. & May, T. W., 2025

O’Donnell, R. P., Linde, C. C. & May, T. W., 2025, Rise up, Rhizoctonia: moving to one fungus, one name in the Ceratobasidiaceae (Agaricomycetes, Cantharellales), Persoonia 54 (1), pp. 285-325 : 310

Rhizoctonia praticola (Kotila) R.P. O’Donnell, C.C. Linde & T.W. May, comb. nov. MB 852075 .

Basionym: Corticium praticola Kotila, Phytopathology 19: 1065. 1929.

Synonyms: ‘ Ceratobasidium praticola ’ (Kotila) L.S. Olive, Amer. J. Bot. 44 (5): 431. 1957, nom. inval. ( Table 3).

Thanatephorus praticola (Kotila) Flentje , Austral . J. Biol. Sci. 16: 451. 1963, as ‘ praticolus ’.

‘ Rhizoctonia praticola ’ H.K. Saksena & Vaartaja, Canad. J. Bot. 39: 637. 1961, nom. inval. ( Table 3).

Type citation: ‘ Type cultivated in the laboratory; obtained in Michigan. Saprophytic in soil and parasitic on Medicago sativa L. in cultivated fields, collected by J. E. Kotila, October, 1924 .’

ITS barcode: AY154307 ( R).

UNITE 1.5 % SH: SH0814616.10FU.

Alternative markers: ATP6 = DQ301604 ; LSU = AF354118 (R); RPB2 = DQ301736 ; TEF 1 = DQ301668 .

Notes: Roberts’ (1999) treatment noted that Thanatephorus praticola represented Rhizoctonia AG-4, while also considering Th. praticola as synonymous with Th. cucumeris (= R. solani ). The results of Gónzalez et al. (2001), Gónzalez et al. (2016) and this study support Rhizoctonia AG-4 as a lineage distinct from R. solani s. s. and for this reason we treat R. praticola as separate from R. solani . Representative sequences for this taxon were selected from sequences of Rhizoctonia AG-4 generated by Gónzalez et al. (2001) and Gónzalez et al. (2016).