. Chestnut blight. Chestnut blight; Chestnut. Chestnut Blight in the Southern Appalachians 5 Their condition and location materially affect the rapidity with which trees become infected. Those along the edges of woods and roads and isolated trees are not only more exposed to spores of the tungus but also have more mechanical injuries. Various mechanical injuries and the work of insects afford places of entry for the para-. /=!£/? C£Nr OF /NrECTED CHESTNUT TREES PER COUNTY ^/e« Mar, / P = /-S. ^ =10-29. lU =30-7S. g = 60-/00. — — = Commercial /fange of Chestnut. Fio. 1.—Map showing the known d
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. Chestnut blight. Chestnut blight; Chestnut. Chestnut Blight in the Southern Appalachians 5 Their condition and location materially affect the rapidity with which trees become infected. Those along the edges of woods and roads and isolated trees are not only more exposed to spores of the tungus but also have more mechanical injuries. Various mechanical injuries and the work of insects afford places of entry for the para-. /=!£/? C£Nr OF /NrECTED CHESTNUT TREES PER COUNTY ^/e« Mar, / P = /-S. ^ =10-29. lU =30-7S. g = 60-/00. — —~ = Commercial /fange of Chestnut. Fio. 1.—Map showing the known distribution of chestnut blight in the southern Ap- palachians in March, 1926 PRESENT DISTRIBUTION The distribution of the chestnut blight in the southern Appa- lachians is shown on a map (fig. 1), which presents the data from the incomplete survey of 1924 and 1925, supplemented by the re- ports of numerous cooperators. Table 1 briefly summarizes the survey of 1925. The degrees of infection which the table and iiiap show are based upon the average percentage of chestnut trees in- fected within a given county (fig. 1). The actual degree of infec- tion within a county varies greatly. For example, a county noted on the map as having an average of 50 per cent blight may contain tracts where the actual infection is less than 5 per cent and other tracts where the extent of the infection may be 95 per cent.. 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 work.. 1906-1960