. Fundamentals of botany. Botany. ECONOMIC IMPORTANCE OF FUNGI 295 3. Alfalfa leaf-spot, the sooty mold of the orange, the powdery mildew of grapes and apples, the wilt disease of cotton and watermelon, the ergot of rye and other cereals (Fig. 215), the black knot of plums and cherries, and the disastrous chestnut disease of the eastern United States. 284. Chestnut Disease.—The chestnut disease (Fig. 216) first appeared in .the vicinity of New York City about. Fig. 217.—Map of the northeastern United States, showing the approxi- mate distribution of the chestnut bark disease in rpii. The disea
. Fundamentals of botany. Botany. ECONOMIC IMPORTANCE OF FUNGI 295 3. Alfalfa leaf-spot, the sooty mold of the orange, the powdery mildew of grapes and apples, the wilt disease of cotton and watermelon, the ergot of rye and other cereals (Fig. 215), the black knot of plums and cherries, and the disastrous chestnut disease of the eastern United States. 284. Chestnut Disease.—The chestnut disease (Fig. 216) first appeared in .the vicinity of New York City about. Fig. 217.—Map of the northeastern United States, showing the approxi- mate distribution of the chestnut bark disease in rpii. The disease has spread further since the map was made. Horizontal lines, area where majority of trees are dead; vertical lines, approximate area where infection is complete; dots, location of advance infections. (After Metcalf. U. S. Dept. Agr., Farmers Bull. 467.) 1904, and from there as a center it has rapidly spread until it has destroyed most of the chestnut trees within a radius of 150 to 200 miles of the city (Fig. 217). As many as 17,000 trees have been destroyed in the city of Brooklyn alone, entailing a total loss of several million. 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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