. Diseases of economic plants. Plant diseases. Pomaceous Fruits 59 distributed, as to the localities in which they produce serious injury, that in the northern apple-growing regions of the eastern United States orchardists spray chiefly to control apple scab; in southern apple-growing regions, it may be necessary to control apple scab, apple blotch, and ])itter-rot; and in other regions to control scab and blotch. The general climatic relationship of these fungi in the eastern United States may be illustrated roughly by their behavior in. Fig. 29. Sprayed apple trees from the same orchard as t
. Diseases of economic plants. Plant diseases. Pomaceous Fruits 59 distributed, as to the localities in which they produce serious injury, that in the northern apple-growing regions of the eastern United States orchardists spray chiefly to control apple scab; in southern apple-growing regions, it may be necessary to control apple scab, apple blotch, and ])itter-rot; and in other regions to control scab and blotch. The general climatic relationship of these fungi in the eastern United States may be illustrated roughly by their behavior in. Fig. 29. Sprayed apple trees from the same orchard as shown in Fig. 28. Illinois. Apple scab is a serious disease in all parts of the state; apple blotch is a serious disease as far as 40° north latitude; and, ordinarily, bitter-rot does not cause serious damage north of 39° latitude. It is thus necessary, in the northern part of the state, to spray for apple scab only; toward the southern part, it is necessary to spray for apple scab and apple blotch; and still farther south, to spray to control apple scab, apple blotch, 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, 1871-1934; Hall, John Galentine, 1870-. New York, Macmillan
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1920, bookyear1921
