. Manual of fruit diseases . Fruit. 418 MANUAL OF FRUIT DISEASES responsible for marked decrease in production such as late frosts, poor management and age of plantations. It reduces the crop by reducing the number of fruit-spurs. Buds are killed and leaves may die. From 2 to 50 per cent of the canes are lost through their brittleness; for when brittle they break easily while t)eing put down in the fall or taken up in the spring. In New York the disease is far less I' - injurious than in Colorado. ' , 1 Symptoms. ' " â JK ^^^ disease is first apparent in |., Bg July. The lesions, one to s
. Manual of fruit diseases . Fruit. 418 MANUAL OF FRUIT DISEASES responsible for marked decrease in production such as late frosts, poor management and age of plantations. It reduces the crop by reducing the number of fruit-spurs. Buds are killed and leaves may die. From 2 to 50 per cent of the canes are lost through their brittleness; for when brittle they break easily while t)eing put down in the fall or taken up in the spring. In New York the disease is far less I' - injurious than in Colorado. ' , 1 Symptoms. ' " â JK ^^^ disease is first apparent in |., Bg July. The lesions, one to several I â¢' Ch ^'^ ^ cane, are sharply defined, con- spicuous, and measure from one to four inches long and may half-way girdle the cane (Fig. 122). Spots are found on the nodes near the ground. They may also occur on the internodes and petioles of the leaves. An area about the buds at the base of the leaves becomes brown, the buds shrivel and become dry. The buds then are either weakened considerably, so that they make only feeble growi;h the follow- ing spring, or they die. In the former case the buds come out, but are small, soon turn yellow, and die. On account of this disease fruit-spurs may not be found for two feet above the ground. However, berries are produced on the upper half. Lesions on the nodes and internodes may coalesce so that the whole lower portion of a cane may become dark. The affected bark splits lon- gitudinally, thus allowing the cane to dry out prematurely. As a result of this desiccation the cane is more brittle than. Fig. 122. â Spur-blight of rasp- 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 Hesler, L. R. (Lexemuel Ray); Whetzel, Herbert Hice, 1877-1944. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1917
