The Cultural Characters of Pseudomonas hyacinthi, Ps. campes- 



TRIS, Ps. PHASEOLI, AND Ps. STEWARTI, FoUR OnE-FlAGELLATE 



Yellow Bacteria Parasitic on Plants. 



INTRODUCTION. 



The morphology and pathogenic properties of Pseudomonas hya- 

 cinthi were described by Wakker in 1S83-18S9,' and were redescribed 

 by the writer in 1897 in Proceedings of the American Association for 

 the Advancement of Science,' and in 1901 in Bulletin No. 2G of this 

 Division.^ 



The morphology, cultural characters, and the pathogenic properties 

 of Pseudomonas campestris were first established by Pammel (in part), 

 in 189p* and were more fully described by the writer in 1897'^ and 

 1898.*"' In 1898 they were described also by RusseH and Harding,^ 



1 (1) Yorlaufige Mittheilungen iiber Hyacinthenkrankheiteu. Botanisches Cen- 

 tralblalt, Bd. XIV, 1883, pp. 315-316. (2) Het geel-of nieuwziek der Hyacinthen 

 veroorzaakt door Bacterium HiiachithiAYsikker. Onderzoek der Ziekten van Hya- 

 cinthen, en andere bol-en knolgewassen. Verslag over het jaar 1883. Haarlem, 

 August, 1884. 8vo, pp. 4-13. (3) Onderzoek der Ziekten van Hyacinthen, en 

 andere bol-en knolgewassen. Verslag over het jaar 1884. Haarlem, May, 1885. 8vo, 

 pp. 1-11. (4) Onderzoek der Ziekten van Hyacinthen, en andere bol-en knol- 

 gewassen. Verslag over het jaar 1885. Haarlem, May, 1887. Kvo, pp. 1-5 and 27- 

 37. (5) Contributions a la pathologic vegetale: 1. La maladie du jaune ou nialadie 

 nouvelle des jacinthes, causee par le Bacterium Hyacinthi. Archives neerlandaises 

 d. Sci. ex. et nat.. Tome XXIII, 1889, pp. 1-25, pi. 1. 



'"Wakker's Hyacinth Bacterium. Proceedings of the Amer. Assoc, for the Adv. of 



Sci., 1897, p. 274. 



'■* Wakker's Hyacinth Germ, Pseudomonas hyacinthi (Wakker)._ Washington, Gov- 

 ernment Printing Office, 1901, pp. 45, 1 pi., 6 text figs. 



^Bacteriosis of RutaV)aga (Barillns campestris n. sjj.). Bull. No. 27, Iowa Exp. 

 Station, Ames, Iowa, 1895, pp. 130-135. 



5(1) Science X. S., Vol. V, June, 1897, p. 963. Abstract of a paper read before the 

 Biological Society of Washington, May, 1897. (2) Pseudomonas campestris (Pam- 

 mel). The cause of a Ijrown rot in cruciferous plants. Centralbl. f. Bakt. 2. Abt., 

 Bd. Ill, July, August, and September, 1897, pp. 284, 408, 478, 1 pi. 



« (1) The black rot of the cabbage. U. S. Dept. of Agr. Farmers' Bulletin No. 68. 

 Jan. 8, 1898. (2) Additional notes on the bacterial brown rot of cabbages. Bot. 

 Gaz., vol. 25, pp. 107-108. Amer. Nat. No. 32, p. 99. Both abstracts of a paper 

 read before See. for Plant Morphology and Physiology in December, 1897. 



"A bacterial rot of cabbage and allied i>lants. Wis. Exp. Station Bull. No. 65, 

 Feb., 1898. (Issued in March.") 



