of seedlings which came up. Further investigations are now in progress to deter- 

 mine whether the results will be repeated under different conditions and to perfect 

 simple machinery for appUcation. 



LITERATURE ON ONION SMUT 



1. Anderson, P. J. Development and pathogenesis of the onion smut fungus. 



Mass. Agr. Expt. Sta. Tech. Bui. 4:99-133. 1921. 



2. Anderson, P. J. The relation of soil moisture to formaldehyde injury of onion 



seedUngs. Phytopathology 13:392-403. 1923. 



3. Anderson, P. J. Controlhng onion smut with KaUmat. Phytopathology 



14:569-574. 1924. 



4. Anderson, P. J. Comparative susceptibility of varieties of onions and species 



of Alhum to Urocystis cepulae. Jour. Agr. Res. (in press). 1925. 



5. Anderson, P. J. and A. V. Osmun. An improved formaldehyde tank for the 



onion drill. Phytopathology 13:161-168. 1923. 



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Hort. Rpt. (191.5-20) 3:187-191. 1921. 



7. Capron, Horace. Diseases of the onion. U. S. Com. Agr. Rpt. (1869) 8:224. 



1870. 



8. Clinton, G. P. North American Ustilagineae. Boston Soc. Nat. Hist. Proc. 



31:329-529. 1904. {U. cepulae on p. i51). 



9. Cooke, M. C. Onion smut. Card. Chron. 7:634. 1877. 



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originaire d'Amerique, causee par une Ustilaginee (Urocystis Cepulae Far- 

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(Urocystis Cepulae Farlow) parasite sur I'oignon ordinaire (Alhum Cepa). 

 Bui. Soc. Bot. France 26:263-267. 1879. 



12. Cornu, M. Observations sur la maladie des oignons (Urocystis Cepulae 



Farlow). Bui. Soc. Bot. France 27:39-42. 1880. 



13. Cotton, A. D. Onion Smut: A disease new to Britain. Jour. Eng. Bd. Agr. 



26:168-174. 1919. 



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societies of Mass. (published with Agr. of Mass. 24 (1876) but paged 

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Bussey Inst. 2:114 and 238. 1877. 



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Mass. Agr. Col. Ext. Circ. 5. 1916. 



17. Frank, A. B. Notiz uber den Zwiebelbrand. Bot. Centbl. 1:186. 1880. 



18. Gregory, C. T. The relation of rain to the formaldehyde treatment of onion 



smut. Phytopathology 12:155-156. 1922. 



19. Hallier, E. Der Brandpilz der Kuchenzwiebel, Urocystis Cepae. Wiener 



Illustrirte Garten-Zeitung 5:519. 1880. 



20. Halsted, B. D. Fungous disease of various crops. N. J. Agr. Expt. Sta. 



Rpt. (1890)11:345-366. 1891. 



21. Halsted, B.D. Ex-periments with onions. N. J. Agr. Expt. Sta. Rpt. (1897) 



18:300-302. 1898. 



22. Halsted, B. D. Artificial introduction of onion smut. Bui. Torrey Bot. 



Club 26:74. 1899. 



23. Halsted, B. D. Experiments with onions. N. J. Agr. Expt. Sta. Rpt. 



(1898) 19:319, 320. 1899. See also (1899) 20:392. 1900 and (1896) 

 17:352. 1897. 



24. Jagger, I. C. Diseases of vegetables. West. N. Y. Hort. Soc. Proc. 60:140- 



147. 1915. 



25. Jones, L. R. Onion smut. Vt. Agr. Expt. Sta. Rpt. (1890) 4:141. 1891. 



26. Jones, L. R. Investigation of plant diseases. Wis. Agr. Expt. Sta. Bui. 



240:47. 1914. See also 250:36. 1915. 



27. LiRO, J. IvAR. Ueber die Gattung Tuburcinia. Ann. Univ. Fenn. Aboensis 



Ser. A. T. 1, No. 1:1:153. Turku. 1922. 



25 



