. Bacteria in relation to plant diseases. Bacteria; Plant diseases. TOBACCO WILT. POTATO DISEASE. RATHAY'S DISEASE. (1) Litmus-milk culture, 12 days old, of Bacillus solanisaprus I. Painted March 19, 1907. (la) Litmus-milk Culture 12 days, old, of Bacillus phytophthorus. Inoculated and painted at same time as fig. 1. (2) Old browned colonies on the surface of an agar plate of the N. C. tobacco organism, poured August 1, 1905, painted October 14; agar stained brown. (3) Litmus-milk culture of Appel's Bacillus phytophthorus. Tube inoculated November 13; 1906. Painted November 26. (4) Uninoculate
. Bacteria in relation to plant diseases. Bacteria; Plant diseases. TOBACCO WILT. POTATO DISEASE. RATHAY'S DISEASE. (1) Litmus-milk culture, 12 days old, of Bacillus solanisaprus I. Painted March 19, 1907. (la) Litmus-milk Culture 12 days, old, of Bacillus phytophthorus. Inoculated and painted at same time as fig. 1. (2) Old browned colonies on the surface of an agar plate of the N. C. tobacco organism, poured August 1, 1905, painted October 14; agar stained brown. (3) Litmus-milk culture of Appel's Bacillus phytophthorus. Tube inoculated November 13; 1906. Painted November 26. (4) Uninoculated (check) tube of litmus-milk. (5) Bacillus solanisaprus Harrison I. An old litmus-milk culture kept in the refrigerator (14°C.) and partly dried out. Inoculated December 10, 1906; painted March 4, 1907. (6) Old potato-culture of Bacillus phytophthorus Appel. Stock 1975, painted March 5, 1907. (6«) Potato-culture of Bacillus solanisaprus Harrison II. Inoculated March 7, 1907, and painted March 19. The colorclose, but the organism wet-shining. (7) An old litmus-milk culture of Hart, solanacearum, Florida potato, tube inoculated June 2, 1905, painted August 28 and equally representative of an old culture of the N. C. tobacco organism. (8, 10) Cross-sections of 9 and 11, showing the characteristic bacterial decay. (9, 11) Internally brown rotted potato tubers from Portsmouth, Va., painted October 18-19, 1905. Infection by way of the vessels of the rhizome; the surface of the tuber not ruptured: Bad. solanaccarum very abundant in the vascular system of rhizomes and tubers. (12, 13) Aplanobaeter rathaui; milk and litmus-milk, 5 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Erwin F. (Erwin Frink), 1854-1927. Washington, Carnegie Inst.
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