. Manual of fruit diseases . Fruit. 58 MANUAL OF FRUIT DISEASES but slightly less susceptible are Smith Cider, Maiden Blush and others. The York Imperial, VVinesap, Grimes and Jonathan are only slightlj'injured by blotch. In the East, blotch is rarely destructive and has never been reported from northeastern United States. Apple-blotch, also known as the star-fungus, fruit-blotch, cancer, leaf-spot, and incorrectly as black-scab and late-scab, first attracted attention from Maryland and Texas in 1897. A few years later the same disease was reported from Illinois and in 1903 it was of serious e
. Manual of fruit diseases . Fruit. 58 MANUAL OF FRUIT DISEASES but slightly less susceptible are Smith Cider, Maiden Blush and others. The York Imperial, VVinesap, Grimes and Jonathan are only slightlj'injured by blotch. In the East, blotch is rarely destructive and has never been reported from northeastern United States. Apple-blotch, also known as the star-fungus, fruit-blotch, cancer, leaf-spot, and incorrectly as black-scab and late-scab, first attracted attention from Maryland and Texas in 1897. A few years later the same disease was reported from Illinois and in 1903 it was of serious extent in Missouri. It is said that the pathogene invaded Kansas about 1905. Symptoms. The disease first shows on the fruit (Fig. 14) about six or eight weeks after the blossoms fall. It is then evidenced by a very small, in- conspicuous light- b r o w n speck, which under slight magnification has the appearance of a stellate collection of brown fibers just beneatli the epi- dermis. The spots enlarge radially, attaining a diam- eter of about one-fourth of an inch, and becoming darker in color. The advancing margin is irregular and has a fringed appearance (Fig. 14). The lesions show some inter- esting variations with varieties. Certain spots may or may not show a fringed margin, and may first be noticed as a dark, slightly sunken area. Not infrequently, the first indication of blotch is in the form of dark-brown, irregular, umbonate elevations. Such a condition occurs on the IJen. Fig. 14. — Apple-blotch, early 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
