. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. SPHAEROTHECA. 173 Sphaerotheca (Podosphaera) castagnei Lev. (Britain and America). The Hop-mildew. The mycelium is found on all parts of hop-plants, causing considerable damage, especially when it attacks the young inflorescences. The perithecia have recumbent, brown, simple appendages. This species appears chiefly on various Compositae, Eosaceae (esp. Spiraea Ulmaria), Gucurbitaceae, Geraniaceae, etc. Sorauer
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. SPHAEROTHECA. 173 Sphaerotheca (Podosphaera) castagnei Lev. (Britain and America). The Hop-mildew. The mycelium is found on all parts of hop-plants, causing considerable damage, especially when it attacks the young inflorescences. The perithecia have recumbent, brown, simple appendages. This species appears chiefly on various Compositae, Eosaceae (esp. Spiraea Ulmaria), Gucurbitaceae, Geraniaceae, etc. Sorauer reports it as very injurious to Fig. 70.—Sphatrotheca ccLStagnei on Spiraea Ulmaria. The white mycelial coating covers every part of the inflorescences. Two specimens are much less deformed than the others, (v. Tubeuf phot.) Oidium farinosum Cooke. Attacks young leaves and calyx of apple; it is easily distinguished from the oidium-condition of the preceding species.^ Sph. mors-uvae B. et C. The Gooseberry-mildew. Is specially injurious to Bibes Uva crispa and other species of Bihes in America. Spraying with a solution of potassium sulphide (J oz. in 1 gallon water) at intervals of twenty days is recommended.^ 'Sorauer, Hedmgia, 1889. ^Halsted ( Department of Agriculture, Report for 1887) describes this disease (Edit.).. 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 Tubeuf, Karl, freiherr von, 1862-1941; Smith, William G. London ; New York [etc. ] : Longmans, Green & co.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
