8 



and bj^ Russell/ More recenth' Harding has shown that the disease 

 produced by this organism occurs in cabbage in various places in 

 Europe;^ and Hecke has demonstrated its occurrence in Kohlrabi in 

 southern Austria.^*" 



Pseudomonas phaseoU ^^ii described briefl}' and named by the writer 

 in 1897,^ after securing numerous infections with pure cultures. The 

 disease which it produces had been previovisly ascribed to bacteria by 

 Beach/ and by Halsted,^ as the result of a microscopic examination, 

 but the organism itself had not been described, nor had it been shown 

 b}^ means of pure culture inoculations to what organism the bean dis- 

 ease was due. Quite recently the same or a ver}^ similar organism has 

 been described briefly by Delacroix, who obtained it from diseased 

 beans in fields near Paris. ^ 



Pseudomonas steivaTtiyf2i^ found in sweet corn and described in 1897 

 by Stewart/ who, however, established its pathogenic nature only 

 inferentialh\ It was named with some additional characterization by 

 the writer in 1898 from a culture furnished by Mr. Stewart for that 

 purpose.^ Doubt still remains as to its pathogenic properties, and 

 must continue until the disease has been produced with pure culture 

 inoculations from this particular species and under conditions preclud- 

 ing its origination by any other organism. Of the existence of a dis- 

 ease of maize due to bacteria no one who has examined specimens from 

 Long Island or elsewhere can have a moment's doubt. The question 

 as to what species causes it can be settled definitely only by successful 

 pure culture inoculations. 



The following pages were originally intended to form part of Bulle- 

 tin 26 of this Division, but the manuscript grew to such an extent 

 under m}^ hands, and came to include so many references to related 



^A bacterial disease of cabbage and allied plants. Proc. 11th, An. Conv. Amer. 

 Col. and Exp. Stations, p. 86. (Issued in March, 1898.) 



^ Die schwarze Fiiulnis des Kohls und verwandter Pflanzen, eine in Europa weit 

 verbreitete bakterielle Pflanzenkrankheit. Centralbl. f. Bakt., 2 Abt., Bd. VI, 1900, 

 No. 10, pp. 305-313. 



2'' Eine Bacteriosis des Kohlrabi. Zeits. f. das land^-. Versuchswesen in Oester- 

 reich, 1901, and subsequent letters to the writer. Inoculating from a pure culture 

 furnished by Dr. Hecke, the writer has also recently produced the typical brown rot 

 in cabbage. 



^Description of Bacillus phaseoU n. sp. with some remarks on related species. 

 Proc. Am. Assoc, for Adv. of Sci. for 1897, pp. 288-290. 



* Blight of Lima Beans. N. Y. Ag. Exp. Station Bull. Xo. 48, new series, Dec, 

 1892, Geneva, N. Y., p. 331. 



^A Bacterium of Phaseolus. Kept, of Bot. Dept. X. J. Exp. Station for 1892, i)p. 

 283-285. 



•^(1) La graisse, maladie bacterienne des Haricots. Comptes Rendus, T. 129, p. 

 656. (2) Annales de I'lnstitut Agronomique, T. , p. . 



■^ A bacterial disease of sweet corn. Bull. 130, Geneva Exp. Station, X. Y. ; also 

 16th Ann. Kept. N. Y. Agr. Exp. Station for the year 1897, pp. 401-416. 



^ Xotes on Stewart's sweet-corn germ, Psendomonas steivarti n. sp. Proc. Am. Assoc, 

 for Adv. of Sci. for 1898, pp. 422-426. 



