. Diseases of economic plants. Plant diseases. 218 Diseases of Economic Plants spots generally show first near the tip or margin, probably because surface water remains longer on these parts. The diseased area soon blackens and dies. The diseased part may temporarily dry out and curl up if the progress of the fungus is checked by drought, or the blight may, in rainy weather, rapidly proceed to transform the entire fohage into a moist,. Fig. 119. — Potato late-blight. Rows at left sprayed with Bordeaux mixture and Paris green; rows at right received Paris green only. Original. putrid mass. In t
. Diseases of economic plants. Plant diseases. 218 Diseases of Economic Plants spots generally show first near the tip or margin, probably because surface water remains longer on these parts. The diseased area soon blackens and dies. The diseased part may temporarily dry out and curl up if the progress of the fungus is checked by drought, or the blight may, in rainy weather, rapidly proceed to transform the entire fohage into a moist,. Fig. 119. — Potato late-blight. Rows at left sprayed with Bordeaux mixture and Paris green; rows at right received Paris green only. Original. putrid mass. In the earlier stage the blackened part is bordered by a narrow region of light green, characterized by a slightly watery, flaccid appearance. Under conditions of especially humid atmosphere a fine, white down may be seen upon the more recently invaded parts. This affection of the leaves is accompanied by an offensive odor discernible at considerable distance from the field. The disease usually soon shows on the stems also, which in turn blacken and 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- [from old catalog]; Hall, John Galentine, 1870- [from old catalog] joint author. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921
