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128 THE BRITISH SMUT FUNGI<br />

SoHLEHUBEB, A. M. (1933). Genetics of resistance to four physiologic foi^ms of bunt in two<br />

winter wheat crosses.—-Northw. Sci., vii, pp. 43-8.<br />

(1935). Wheat inheritance: reaction to four bunt biotypes, ^ike density, and seed<br />

colour.—Bull. Wash, St. agrie. exp. Sta. 323 (Tech. paper), 32 pp.<br />

(1937). Studies on the eflfeot of bunt, Tilletia tritici and Tilletia levis, on wheat.—<br />

Phytopath. Z., x, pp. 614-31. ',<br />

(1938). The inheritance of reaction to physiologic races of Tilletia tritici (Bjerk.) Wint.<br />

in a winter wheat cross.—Res. Stud. St. Coll. Wash., vi, pp. 75-96.<br />

SoHMiTT, C. G. (1940). Cultural and genetic studies on XJstilago zeae.-—Phytopathology, xxx,<br />

pp. 381-90.<br />

ScHOPFEE, W. H. (1937). tTber die Einwirkung von Aneruin auf das Wachstum von<br />

Ustilago violacea.—Ber. dtsch. bot. Ges., Iv, pp. 572-6.<br />

& BLTJMEB, S. (1938). Les faoteurs de croissance des espfeces du genre Ustilago.—<br />

C.if. Acad. Sci., Paris, covi, pp. 1141-3.<br />

ScHBOETEB, J. (1877). Bemerkungen und Beobaohtungen iiber einige Ustilagineen.—<br />

- Cohn, Beitr. Biol. Pfl., ii, pp. 349-85.<br />

(1887). DiePilzeSchlesiens,i (Cohn: Kryptogamen-Flora vonSchlesien,ni),-pp. 261-91.<br />

SCHWARTZ, E. J. (1910). Parasitic root diseases of the Juncaceae.—Ann. Bot., Land., xxiv,<br />

pp. 611-22.<br />

SEHTERT, J. (1926). Kiinstliche Bluteninfektionen ziu" Untersuchung der Empfangliehkeit<br />

versohiedener Gerstensorten fur Ustilago hordei und nuda vmd der Einfluss der ausseren<br />

Bedingungen auf die Hohe des Brandprozentes.—KiXhn-Archiv, xii, p. 423.<br />

SEMBNitTK, W. (1940). Physiologic races of Ustilago hordei (Pers.) K. & S. in Alberta.—<br />

Canad. J. Res., Sect. C, xviii, pp. 76-8.<br />

SETCHBLL, W. A. (1892). An examination of the species of the genua Doassansia Cornu.—<br />

Ann. Bot., Lond., vi, pp. 1-47.<br />

SEYFEBT, R. (1927). tJber Schnallenbildung im Paarkemmyzel der Brandpilze.—Z. Bot.,<br />

xix, pp. 577-601.<br />

SHANDS, R. G. (1941). Disease resistance of Triticum timopheevi transferred to oonunon<br />

winter wheat.^—J. Amer. Soc. Agron., xxxiii, pp. 709-12.<br />

SHBN, T. H. (1934). The inheritance of resistance to flag smut (Vrooystis tritici Koern.) in<br />

ten wheat crosses.—Bull. Nanking Coll. Agric. For., N.S., xvii, 16 pp.<br />

SiMMONDS, P. M. (1946). Detection of the loose smut fungi in embryos of barley and wheat.—<br />

Sci. Agric., xxvi, pp. 51-8.<br />

SLEXTMBE, H. O. (1932). tJber SexuaUtat und Zytologie von Ustilago zeae (Beckm.) Unger.—<br />

Z. Bot., XXV, pp. 209-63.<br />

SMITH, D. C, & BEESSMAN, E. N. (1931). SusceptibiUty of Markton and other varieties of<br />

oats to covered smut {Ustilago levis).—J. Amer. Soc. Agron., xxiii, pp. 465-68.<br />

SMITH, W. K. (1932 a). The effect of different temperatures on the reaction of Hope wheat<br />

to bimt.—Phytopathology, xxii, pp. 615-27.<br />

(1932 b). Reaction of Martin wheat to three physiologic forms of Tilletia tritici.—<br />

Phytopathology, xxii, pp. 847-50.<br />

(1933). Inheritance of reaction of wheat to physiologic forms of Tilletia levis and<br />

T. tritici.—J. agric. Res., xlvii, pp. 89-105.<br />

SNEIXL, K. (1938). Die Priifvmg der Widerstandsfahigkeit von Getreide und Riibensorten.—<br />

Angew. Bot., xx, pp. 446-53.<br />

SoBEL, M. (1933). The viability of the spores of the cereal smuts.—Biologist, xv, pp. 95-6.<br />

SPANGENBBEG, G. E., & GuTNEB, L. S. (1936). Investigation in the field of the physiological<br />

races constituting wheat bunt {Tilletia levis Kuhn and T. tritici Wint.).—Summ. sci.<br />

Res. Wk Inst. PI. Prot. Leningr., 1935, pp. 489-91. [In Russian, Rev. appl. Mycol., xvi,<br />

p. 27.]<br />

STAKMAN, E. C. (1913). Spore germination of cereal smuts.—Bull. Minn, agric. Exp. Sta.<br />

133, 52 pp.<br />

(1936). The problem of specialization and variation in phytopathogenic fungi.—<br />

Oenetica, xviii, pp. 372-89.<br />

, CASSBLL, R. C, & MooEE, M. B. (1934). The cytology of Urocystis occulta.—Phytopathology,<br />

xxiv, pp. 874^89.<br />

& CHEISTBNSBN, J. J. (1927). Heterothallism in Ustilago zeae.—Phytopathology, xvii,<br />

pp. 827-34.<br />

, , EiDE, C. J., & PETUBSOK, B. (1929). Mutation" and hybridization in Ustilago<br />

zeae.—Tech. Bull. Minn, agric. Exp. Sta. 65, 108 pp. (Part 2, Hybridization. By J. J.<br />

Christensen).<br />

, KEENKAMP, M. F., MAETIK, W. J., & KINO, T. H. (1943). The inheritance of a white<br />

mutant character in Ustilago zeae.—Phytopathology, xxxiii, pp. 943-9.

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