. Bacteria in relation to plant diseases. Bacteria; Plant diseases. rathay's disease of orchard grass. 159 able to grow it in +15 beef peptone bouillon. At the end of 16 days small circular yellow colonies appeared on some of the agar plates, and transfers grew fairly well on the surface of agar stab-cultures. It also grew slowly on agar-stabs when intro- duced along with the white organ- ism mentioned below. It did not grow readily in nitrate bouillon. In the plant it is quite inclined to be associated with a white lique- fying organism which grows as a very short rod usually in pairs or four
. Bacteria in relation to plant diseases. Bacteria; Plant diseases. rathay's disease of orchard grass. 159 able to grow it in +15 beef peptone bouillon. At the end of 16 days small circular yellow colonies appeared on some of the agar plates, and transfers grew fairly well on the surface of agar stab-cultures. It also grew slowly on agar-stabs when intro- duced along with the white organ- ism mentioned below. It did not grow readily in nitrate bouillon. In the plant it is quite inclined to be associated with a white lique- fying organism which grows as a very short rod usually in pairs or fours with a plain constriction. This white organism grows in agar, where it is motile in early stages of growth on the margin of the colo- nies. It was not clearly motile when taken from a 5-day potato culture, and here T's and Y's were seen. It stains by Gram. The yellow organism is alcohol fast, but not acid fast. It is Gram positive, and during the viscid stage. 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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