. Diseases of economic plants. Plant diseases. Vegetable and Field Crops 261 as the cause of partial or even total losses of the crop. The plants usually reach considerable size, blossom, and set fruit before showing the disease, which first appears in the field on single plants, generally sickly looking, and of unhealthy color, followed by symptoms of wilt. In the worst cases all of the plants die before the end of the growing season, sometimes quite suddenly at the last; or the crop may mature with plants missing more or less extensively. If a l)a(lly affected or dead plant l)e pulled up, th
. Diseases of economic plants. Plant diseases. Vegetable and Field Crops 261 as the cause of partial or even total losses of the crop. The plants usually reach considerable size, blossom, and set fruit before showing the disease, which first appears in the field on single plants, generally sickly looking, and of unhealthy color, followed by symptoms of wilt. In the worst cases all of the plants die before the end of the growing season, sometimes quite suddenly at the last; or the crop may mature with plants missing more or less extensively. If a l)a(lly affected or dead plant l)e pulled up, the roots are. I i«.. 1 12. - Tuiuatu licld showjag effect of wilt. found to be decayed. If a plant is pulled up as soon as it begins to show wilting, the roots look healthy and sound, but close inspection shows that many of the larger laterals are decayed at the ends. The disease consists of a dry rot of the roots, commencing at the ends and working upward. The first symptom is a pale yellowish color of the lower leaves, which soon dry from the tip toward the base without spotting. The veins and woody portion of the stem are darkened, especially upon the side bearing the diseased leaves. As to means of dissemination and control, what is said under soil diseases will 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 Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870-. New York, Macmillan
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1920, bookyear1921
