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120 THE BRITISH SMUT FUNGI<br />

HiBSCHHOKN, ELISA, & HiESCHHOEN, J. (1939). Pormas fisiologicas en 'Ustilago zeae' de<br />

diversas localidades de la Argentina. Su caraoterizacion geografica.—Physis, B. Aires,<br />

xviii, 50, pp. 181-222.<br />

HoHNEL, FBANZ VON (1924). Beitrag zur Kenntnis der Gattung Cylindrosporium Grev.—<br />

Ann. mycol., Berl., xxii, pp. 191-203.<br />

HoLTON, C. S. (1930). A probable explanation of recent epidemics of bunt in durum<br />

wheats.—Phytopathology, xx, pp. 353-7. i<br />

(1931 a). The relation of physiologic specialization in TiUetia to recent epiphytotics<br />

of bunt in dunnn and Marquis wheats.—Phytopathology, xxi, pp. 687-94.<br />

—— (1931 b). Hybridization and segregation in the oat smuts.—Phytopathology, xxi,<br />

pp. 835-42.<br />

(1932). Studies in the genetics and the cytology of Ustilago avenae and Ustilago levis.—<br />

Tech. Bull. Minn, agric. Exp. Sta. 87, 34 pp.<br />

• (1935). Studies on seven differentiating characteristics of two physiolog'ie forms of<br />

T. tritici.— Phytopathology, xxv, pp. 1091-8.<br />

(1936 a). Origin and production of morphologic and pathogenic strains of the oat<br />

fungi by mutation and hybridization.—J. agric. Res., lii, pp. 311-17.<br />

(1936 b). Inheritance of chlamydospore characteristics in oat smut fungi.—J. agric.<br />

Res., lii, pp. 535-40.<br />

•—-— (1938 a). A new pathogenically distinct race derived from a cross between TiUetia<br />

tritici and T. levis.—Phytopathology, xxviii, pp. 371-2.<br />

. (1938 b). A simple method of inoculating wheat seedlings with paired monosporidial<br />

lines of TiUetia tritici and T. levis.—Phytopathology, xxviii, pp. 618-20.<br />

(1943). Chlamydospore germination in the fungus causing dwarf bunt of wheat.—<br />

Phytopathology, xxxiii, pp. 732-5.<br />

— (1944). Inheritance of chlamydospore and sorus characters in species and race hybrids<br />

of TiUetia caries and T. foetida.—Phytopathology, xxxiv, pp. 586-92.<br />

(1947). Host selectivity as a factor in the establishment of physiologic races of<br />

TiUetia caries and T. foetida produced by hybridization.—Phytopathology, xxxvii,<br />

pp. 817-21.<br />

• & FisoHEK, G. W. (1941). Hybridization between Ustilago avenae and U. perennans.—•<br />

J. agric. Res., Ixii, pp. 121-8.<br />

• & HEALD, F. D. (1936). Studies on the control and other aspects of bunt of wheat.—•<br />

BuU. Wash. St. agric. Exp. Sta. 339, 35 pp.<br />

—— (1941). Bunt or stinking smut of wheat. 211 pp.<br />

— & JOHNSON, A. G. (1943). Physiologic races in Urocystis tritici.—Phytopathology,<br />

xxxiii, pp. 169-71.<br />

& HoDENHiSEU, H. A. (1942). i5ew physiologic races of Tilletio tritici and T. levis.—•<br />

Phytopathology, xxxii, pp. 117-19.<br />

& SuNESON, C. A. (1942). Varietal reaction to bunt in the western wheat region of the<br />

United States.—J. Amer. Soc. Agron., xxxiv, pp. 63-71.<br />

(1943). Wheat varietal reaction to dwarf bunt in the western wheat region of the<br />

United States.—J. Amer. Soc. Agron., xxxv, pp. 579-83.<br />

HoppB, P. E. (1948). Seed treatment with mercury dusts injurious to com with mechanical<br />

injuries near embryo.—Phytopathology, xxxviii, pp. 82-3.<br />

HtJBBAED, V. C, & STANTON, T. B. (1934). Influence of smut infection on plant vigor and<br />

other characters in smut-resistant oat varieties.—/. agric. Res., xlix, pp. 903-8.<br />

HtJLEA, A. (1947). Speciile de TiUetia care produc malura graului.—Publ. Inst. Cere, agron.<br />

Roman., 99, 178 pp.<br />

HTJMPHKEY, H. B., & CoFFMAN, F. A. (1937), A study of the reaction of Fj oat hybrids and<br />

their respective parental lines to inoculation with smuts and rusts.—Phytopathology,<br />

xxvii, pp. 183-9.<br />

& TAPKB, V. F. (1925). The loose smut of rye {Ustilago tritici).—Phytopathology, xv,<br />

pp. 598-605.<br />

HxTNGEKFORD, C. W. (1922). The relation of soil moisture and soil temperatiu'e to bunt<br />

infection in wheat.—Phytopathology, xii, pp. 337-52.<br />

HUNT, W. H., & THOMPSON, M. R. (1938). A pharmacological study of Ustilago.—J. Amer.<br />

pharm. Ass., xxvii, pp. 740-52.<br />

HxHRD, A. M. (1921). Seed coat injury and viability of seeds of wheat and barley as factors<br />

in susceptibility to molds and fungicides.—J. agric. Res., xxi, pp. 99-122.<br />

HtTTCHiNQs, H, L., & 51.UTMAN, B. F. (1938). Spine development on the spores of Ustilago<br />

zeae.—Phytopathology, xxviii, pp. 859-60.<br />

HiJTTiQ, W. (1931). Uber den Einfluss der Temperatur auf die Keimung und Geschlechtsverteilung<br />

bei Brandpilzen.—Z. Bot., xxiv, pp. 529-57.

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