. Bacteria in relation to plant diseases. Bacteria; Plant diseases. From these observations and experiments we may conclude that many infections take place above ground and that frequent germicidal sprayings might be expected to hold the disease in check. Anyway, Bordeaux mixture should be tried and also the self-boiled lime- sulphur mixture as made by Seott for the prevention of Monilia on peaches (see Bull. 174, Bureau of Plant Industry, U. S. Department of Agriculture, 1910), and if immediate good results are not obtained the method should not be condemned, since the sprayed plants may have
. Bacteria in relation to plant diseases. Bacteria; Plant diseases. From these observations and experiments we may conclude that many infections take place above ground and that frequent germicidal sprayings might be expected to hold the disease in check. Anyway, Bordeaux mixture should be tried and also the self-boiled lime- sulphur mixture as made by Seott for the prevention of Monilia on peaches (see Bull. 174, Bureau of Plant Industry, U. S. Department of Agriculture, 1910), and if immediate good results are not obtained the method should not be condemned, since the sprayed plants may have been infected prior to the spraying, the progress of the disease being rather slow. The signs of the disease are shown on the plates already mentioned, and the morbid anatomy so far as worked out is given in figs. 72 to 75. *Fig. 72.—Cross-section of the softer upper part of a tomato stem some months after inoculation with a pure cul- ture of Aplanobacter michigaiiense and at a distance of several decimeters from the place where the needle entered. For appearance of the plants see plates 12 to 15. Pith in the upper part of the section; a and b, bacterial cavities in the inner phloem similar to the one in the outer phloem but older, and the bacteria and tissue fragments washed out in prep- aration of the section; the lower heavily shaded parts represent collenchyma (all more or less shriveled by alcohol). Slide 539 F 4, upper row, left section. Camera drawing. Zeiss 16 mm. obj., and No. 8 comp. ocular. Inoculation of 1909. fFiG. 73.—A detail from fig. 72 to show the individual bacteria. The drawing is taken from the margin of the cavity in the outer phloem. Zeiss 2 mm. apochromatic obj., and No. 12 comp. 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. Wa
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