Cochliobolus miyabeanus (Japanese Fungi on Plants)

Japanese Fungi on Plants No.23 before next top

Cochliobolus miyabeanus (Ito & Kurib.) Drechs. ex Dastur [=Bipolaris oryzae (Breda de Haan) Shoem., B. leersiae (Atk.) Shoem., B. zizaniae (Nisikado) Shoem.]
Classification: Ascomycota, Locuoascomycetes, Dothideales, Pleosporaceae

Distributed mainly south from Kanto, the central part of Japan, causes leaf spot on Oryza, Leersia, Zizania, etc. Disperses by scattering conidia. Teleomorph has never been observed in nature.

Characteristics: Plant pathogen

		Morphology: Teleomorph: Produced by paired culture on artificial media. Producing cylindrical asci in blackish brown pseudothecia. Hyaline to pale olive brown and filamentous ascospores of 235-648 x 4-9 um produced in coiled helix in asci. Anamorph: On pale brown to olive golden brown conidiophores, producing conidia, curved, pale brown to olive brown, cylindrical to fusiform, 63-153 x 14-22 um, hilum minute, with 6-14 pseudosepta.
Conidia

Herbarium specimen in NIAES

Specimen No.	Scientific name	Host name	Host scientific name	Symptoms	Geographical origin	Collected date	Collector
256-1-12	Cochliobolus miyabeanus	rice	Oryza sativa	Leaf spot	Itabashi, Tokyo	1937.6.17
101-1-47	"	"	"	"	Horimatsu, Ishikawa	1943.7.27
101-1-51	"	"	"	"	Urawa, Saitama	1943	Kawamura, E.
101-1-52	"	"	"	"	Sakurajima, Chiba	1944.5.29	Asuyama, H.
101-1-48	"	"	"	"	Ujiie, Tochigi	1958.9.12	Tsuchiya, Y.
256-1-2	"	"	"	"	Shizuoka, Shizuoka	1973.10.3	Tominaga, T.

(Described by Tsukiboshi, T., NIAES, Microbial Systemtics Lab., 2003)