. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 358 FUNGOUS DISEASES OF PLANTS XLIX. LEAF SPOT OF THE PEAR Septoria Pyricola Desm. Duggar, B. M. Some Important Pear Diseases. Leaf Spot. Cornell Agl. Exp. Sta. Built. 145: 597-611. figs. 157-163. 1898. The leaf spot of pear is a disease which may be readily dis- tinguished from the leaf blight subsequently described. It occurs throughout the eastern United States as an important fungus, both. Fig. 176. Leaf Spot of Pear in orchards and nurseries. It is probably found throughout No
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 358 FUNGOUS DISEASES OF PLANTS XLIX. LEAF SPOT OF THE PEAR Septoria Pyricola Desm. Duggar, B. M. Some Important Pear Diseases. Leaf Spot. Cornell Agl. Exp. Sta. Built. 145: 597-611. figs. 157-163. 1898. The leaf spot of pear is a disease which may be readily dis- tinguished from the leaf blight subsequently described. It occurs throughout the eastern United States as an important fungus, both. Fig. 176. Leaf Spot of Pear in orchards and nurseries. It is probably found throughout North America and is reported from various parts of Europe. The leaf spot fungus is confined to the leaves, and in orchards the chief injury to trees may be the reduced vigor for the next season, due to premature defoliation. It is rather remarkable that while seedling apple stock in a nursery may show leaf blight to a considerable extent, adjacent plots of budded plants may be seri- ously injured by the leaf spot. The budded stock of the second year usually suffers more severely, particularly since it is generally less cultivated after the first season. In the state of New York most of the standard varieties may be attacked. Bosc, Anjou, Clairgeau, Seckel, Bartlett, etc., may be considerably injured, but Flemish Beauty, Duchess, and Winter Nellis are more 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 Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn
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