Fungous diseases of plants . lly inrolled at the tip Unci nil la 2. Appendages swollen at the base so as to form an enlarged plate. Phyllactinia XXII. THE GOOSEBERRY MILDEWSphcerotheca Mors-uvcc (Schw.) B. & C. Close, C. P. Treatment for Gooseberry Mildew. N. Y. (Geneva) Agl. Exp. Sta. Built. 161 : 153-164. pis. 1-2. , J. Der amerikanische Stachelbeermehltau in Europa, seine jetzige Verbreitung und der Kampf gegen ihn. Zeitsch. f. Pflanzenkr. 16 : 83- 90. , E. S. On the Present Aspect of the Epidemic of the American Gooseberry Mildew in Europe. Journ. Roy. Hort. Soc. 29
Fungous diseases of plants . lly inrolled at the tip Unci nil la 2. Appendages swollen at the base so as to form an enlarged plate. Phyllactinia XXII. THE GOOSEBERRY MILDEWSphcerotheca Mors-uvcc (Schw.) B. & C. Close, C. P. Treatment for Gooseberry Mildew. N. Y. (Geneva) Agl. Exp. Sta. Built. 161 : 153-164. pis. 1-2. , J. Der amerikanische Stachelbeermehltau in Europa, seine jetzige Verbreitung und der Kampf gegen ihn. Zeitsch. f. Pflanzenkr. 16 : 83- 90. , E. S. On the Present Aspect of the Epidemic of the American Gooseberry Mildew in Europe. Journ. Roy. Hort. Soc. 29: 23. 1905. This species has long been known as the cause of an im-portant disease of gooseberries in the United States. It occurs 222 FUNGOUS DISEASES OF PLANTS upon the leaves and stems, but particularly upon the berries ofthe host, and it may sometimes cause injury to currant mycelium is more persistent than that of most is one of the few forms the mycelium of which becomes buff. Fig. 87. Gooseberry Mildew. (After Close) or brown and thick-walled with age. The mycelium forms densecircular or effuse patches, sometimes completely covering a berryand the adjacent twig. The perithecia are imbedded in the dense mycelium. Theyaverage about 80-ioo/x in diameter and are beset with a fewlight brown, tortuous appendages. A single subglobose ascus ASCOMYCETES 223 contains relatively large spores. According to Salmon this speciesis indistinguishable from the Sphaerotheca found in Europe uponEuphorbia, The latter is, however, not very common in Europe,During the summer of 1906 a serious outbreak of gooseberrymildew was reported in Europe. The fungus has spread rapidly,and the result of this outbreak will undoubtedly afford European
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