. The fungi which cause plant disease . Plant diseases; Fungi. 200 THE FUNGI WHICH CAUSE PLANT DISEASE Hypomyces Fries (p. 197) Stroma an effused cottony subicnlvun, often of considerable extent; perithecia numerous, usually thickly scattered and im- mersed in the subiculum, rarely superficial; asci cylindric, 8-spored; spores fusoid or fusiform, usually apiculate, rarely blunt, 2-celled, hyaline; conidial phase variable. This genus of some forty species contains but few > saprophytes, the majority being parasitic, chiefly on the larger fimgi. The genus is of economic interest only as affec
. The fungi which cause plant disease . Plant diseases; Fungi. 200 THE FUNGI WHICH CAUSE PLANT DISEASE Hypomyces Fries (p. 197) Stroma an effused cottony subicnlvun, often of considerable extent; perithecia numerous, usually thickly scattered and im- mersed in the subiculum, rarely superficial; asci cylindric, 8-spored; spores fusoid or fusiform, usually apiculate, rarely blunt, 2-celled, hyaline; conidial phase variable. This genus of some forty species contains but few > saprophytes, the majority being parasitic, chiefly on the larger fimgi. The genus is of economic interest only as affecting mushrooms, though one species, H. hyaclnthi has been found causing secondary infec- tion in onions, following â ^ , â "^ . a bacterial trouble, and Fig. 141.â^Hypomyces ochraceus. B, pen- i ⢠t> â i thecia; C, asci and spores; D, spores; E, co- another; H. SOlani KeinRe nidia; f. chlamydospores. After Tulasne. ^^^^^^^ ^ ^^^^^ ^^^^^ on potatoes. Chlamydospores and conidiospores develop, be- longing to various form genera as Verticillium, Mycogone, Fuhgo, Diplocladium, DictyUum, Sepedonium, Blastotrichum. Alhed to this genus are probably Mycogone rosea and M. per- niciosa, which are destructive enemies of mushroom culture. Melanospora Corda (p. 197) Perithecia superficial, without a stroma, globose-pyriform or flask-shaped, with a long neck which is usually clothed at the tip with a fringe of hairs, perithecia often hairy; asci broadly clavate, 4 to 8-spored; spores 1-celled, brown to brownish-black. The genus contains some forty species, mostly common saproph3^es. M. damnosa (Sacc.) Lin. is serious on wheat and rye.^^'' '**. 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 Stevens, Frank Lincoln, 1871-1934. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
