. Bacteria in relation to plant diseases. Bacteria; Plant diseases. 120 BACTERIA IN RELATION TO PLANT DISEASES. 859 [Emerson's First Crop].—Very bad looking. Cases, 8; sound, o. 860 [Cosmopolitan].—All stems dead, with dried tassels and brown leaves. Cases, 21; sound, 7. 861 [Metropolitan].—A slightly better stand, but most of the plants show the external signs of the disease. Cases, 18; sound, 12. Some of these cases showed only one or two bundles affected. 862 [Hys' Metropolitan].—Looks about like 861. Many plants show external signs of disease, but there is a better stand than in the first
. Bacteria in relation to plant diseases. Bacteria; Plant diseases. 120 BACTERIA IN RELATION TO PLANT DISEASES. 859 [Emerson's First Crop].—Very bad looking. Cases, 8; sound, o. 860 [Cosmopolitan].—All stems dead, with dried tassels and brown leaves. Cases, 21; sound, 7. 861 [Metropolitan].—A slightly better stand, but most of the plants show the external signs of the disease. Cases, 18; sound, 12. Some of these cases showed only one or two bundles affected. 862 [Hys' Metropolitan].—Looks about like 861. Many plants show external signs of disease, but there is a better stand than in the first four or five rows. Cases, 14; sound, 14. Of the diseased stems in this lot 5 or 6 had only one or two bundles diseased. 863 [Crosby's Early].—Looks diseased, but is a rather better stand than others. Cases, 15; sound, 15. Some of the cases only slightly diseased. A little of this seed corn remained undistributed in the hands of the Free Seed Distri- bution officials of the Department of Agriculture. As soon, therefore, as possible after the discovery of the above-mentioned facts respecting infection of the trial rows, i. e., the same summer, the writer procured a quantity of the corn and had it planted on another Fig. 51.* Fig. 52. f The place selected was an old field on the Arlington estate, one which certainly had not been planted in maize since before the Civil War, i. c, for more than 40 years, and perhaps never. This field is about a mile and a half from the trial plots just described, on the other side of the Potomac River, and there was very little communication between the two farms, i. e., the management used different teams and tools and another set of farm laborers. Here, if anywhere, one might expect to get the uncomplicated effect of the seed, since we *Fig. 51.—Surface of a corn-husk highly magnified, showing a single stoma with Bacterium stewarti oozing to the surface. The conditions immediately under such a stoma are shown in figs. 50 and 52.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashingtoncarnegie
