Fungous diseases of plants . Fig. 175. Leaf Blotch of Rose 358 FUNGOUS DISEASES OF PLANTS XLIX. LEAF SPOT OF THE PEAR Septoria Pyricola Desm. DuGGAR, B. M. Some Important Pear Diseases. Leaf Spot. Cornell Sta. Built. 145: 597-611. figs. 1^7-16^. 1898. The leaf spot of pear is a disease whicli may be readily dis-tinguished from the leaf blight subsequently described. It occursthroughout the eastern United States as an important fungus, both. Fig. 176. Leaf Siot of Pear in orchards and nurseries. It is probably found throughout NorthAmerica and is reported from various parts of Europe.
Fungous diseases of plants . Fig. 175. Leaf Blotch of Rose 358 FUNGOUS DISEASES OF PLANTS XLIX. LEAF SPOT OF THE PEAR Septoria Pyricola Desm. DuGGAR, B. M. Some Important Pear Diseases. Leaf Spot. Cornell Sta. Built. 145: 597-611. figs. 1^7-16^. 1898. The leaf spot of pear is a disease whicli may be readily dis-tinguished from the leaf blight subsequently described. It occursthroughout the eastern United States as an important fungus, both. Fig. 176. Leaf Siot of Pear in orchards and nurseries. It is probably found throughout NorthAmerica and is reported from various parts of Europe. The leaf spot fungus is confined to the leaves, and in orchardsthe chief injury to trees may be the reduced vigor for the nextseason, due to premature defoliation. It is rather remarkable thatwhile seedling apple stock in a nursery may show leaf blight to aconsiderable extent, adjacent plots of budded plants may be seri-ously injured by the leaf spot. The budded stock of the secondyear usually suffers more severely, particularly since it is generallyless cultivated after the first season. In the state of New Yorkmost of the standard varieties may be attacked. Bosc, Anjou,Clairgeau, Seckel, Bartlett, etc., may be considerably injured, butFlemish Beauty, Duchess, and Winter Nellis are more resistant. FUNGI IMPERFECTI 159 The Kieffer is practically exempt. In any case, however, thefungus may be readily controlled with Bordeaux. The spots on the
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