398 PHYSIOLOGY OF THE FUNGI 



Rosen, H. R.: Efforts to determine the means by which the cotton wilt fungus, 

 Fusarivm vasinfedum, produces wilting, Jour. Agr. Research 33: 1143-1162, 

 1926. 

 Sabouraud, R.: Maladies du cuir chevelu. Vol. Ill, Les Maladies cryptogamiques, 

 Les Teignes, Masson et Cie, Paris, 1910. 



Salmon, E. S.: On the stages of development reached by certain biological forms of 

 Erysiphe in cases of non-infection, Neiv Phytologist 4: 217-222, 1905. 



Schmidt, M.: Zur Entwicklungsphysiologie von Cladosporium Jidvxim und liber die 

 Widerstandfjihigkeit von Solanum racemigerum gegen diesen Parasiten, Planta 

 20: 407-439, 1933. 



Sharvelle, E. J.: The nature of resistance of flax to Melampsora lint, Jour. Agr. 

 Research 53: 81-127, 1936. 

 *Smith, F. G., J. C. Walker, and W. J. Hooker: Effect of hydrogen-ion concentra- 

 tion on the toxicity to Colletotrichum circinans (Berk.) Vogl. of some carboxylic 

 acids, phenols, and crucifer extracts. Am. Jour. Botany 33: 351-356, 1946. 



Smith, L. D. S.: Clostridia in gas gangrene. Bad. Revs. 13: 233-254, 1949. 



Stakman, E. C. : a study in cereal rusts. Physiological races, Minn. Agr. Expt. 

 Sta. Bull. 138, 1914. 



Steinhaus, E. A.: Insect Microbiology, Comstock Publishing Company, Inc., Ithaca. 

 1946. 



Tapke, V. F.: Influence of varietal resistance, sap acidity and certain environ- 

 mental factors on the occurrence of loose smut of wheat. Jour. Agr. Research 

 39:313-319, 1929. 



Taylor, C. F., and P. Decker: A correlation between pathogenicity and cultural 

 characteristics in the genus Actinomyces, Phytopathology 37 : 49-58, 1947. 



Thatcher, F. S. : Osmotic and permeability studies in the nutrition of fungus 

 parasites. Am. Jour. Botany 26 : 449-458, 1939. 

 *Thatcher, F. S.: Further studies of osmotic and permeability relations in parasi- 

 tism. Can. Jour. Research 20: 283-311, 1942. 



Thom, C, and K. B. Raper: A Manual of the Aspergilli, The Williams & Wilkins 

 Company, Baltimore, 1945. 



Thomas, H. E.: Studies on Armillaria mellea (Vahl.) Quel., infection, parasitism and 

 host resistance. Jour. Agr. Research 48: 187-218, 1934. 



Vasudeva, R. S. : Studies in the physiology of parasitism. XL An analysis of the 

 factors underlying specialism of parasitism, with special reference to the fungi 

 Botrytis allii and Monilia frudigena, Ann. Botany 44: 469-493, 1930. 



Walker, J. C: On the nature of disease resistance in plants, Trans. Wisconsin Acad. 

 Sci. 21 : 225-247, 1924. 

 *Walker, J. C. : Soil management and plant nutrition in relation to disease develop- 

 ment. Soil Sci. 61 : 47-54, 1946. 



Walker, J. C, and K. P. Link: Toxicity of phenolic compounds to certain onion 

 bulb parasites, Botan. Gaz. 96 : 468-484, 1935. 



Ward, M. : On the relations between host and parasite in the bromes and their 

 brown rust, Puccinia dispersa Erikss., Ann. Botany 16: 233-315, 1902. 



Ward, M.: Recent researches on the parasitism of fungi, Ann. Botany 19: 1-54, 

 1905. 



Waters, C. W.: The relations of bean rust grown on leaves in solution. Papers Mich. 

 Acad. Sci. 5: 163-177, 1926. 



Wellensiek, S. J. : The nature of resistance in Zea mays L. to Puccinia sorghi Schw., 

 Phytopathology 17: 815-825, 1927. 

 * Wingard, S. a. : The nature of disease resistance in plants, Botan. Rev. 7 : 59-109, 

 1941. 



