. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. FUNGI IMPERFECTI (dEUTEROMYCETES) 267 fungus which causes leaf spot of beets, Cercospora beticola. The form genus Fusarium (Fig. 109), established by Link in 1809, is one which has come into prominence recently as associated with the production of serious plant diseases. At least eleven species are found on the sweet potato (Fig. 108), and these have been investigated by H. W. WoUenweber' and other mycologists. He finds that the genus has a number of vegetative and spore stages the vari
. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. FUNGI IMPERFECTI (dEUTEROMYCETES) 267 fungus which causes leaf spot of beets, Cercospora beticola. The form genus Fusarium (Fig. 109), established by Link in 1809, is one which has come into prominence recently as associated with the production of serious plant diseases. At least eleven species are found on the sweet potato (Fig. 108), and these have been investigated by H. W. WoUenweber' and other mycologists. He finds that the genus has a number of vegetative and spore stages the variability of which has caused confusion, as transfers of myceUum produce a growth quite different in general appearance from that derived from spores from the. Fig. 109.—Spores of two stem-rot organisms. A, Fusarium hataialis and B. F. hyperoxysporum, XSOO. {After Barter, L. L., V. S. Farmers' Bull. 714, March 11, 1916.) same medium under conditions otherwise identic. 'JVoUenweber and AppeP have published a monograph of Fusarium and later Wollen- weber has studied the Fusarium problem and similar studies should be made of each one of the form genera of the Fungi Imperfecti. The genus Fusarium is divisible into sections not only by physiologic characters (pathogenicity) but also by morphologic characters (coni- diospores, chlamydospores). The section, Elegans, comprises the vascular parasitic Fusaria, which are serious enemies of plants, causing ' WoLLENWEBER, H. W.: Identification of Species of Fusarium occurring on the Sweet Potato, Ipomcea batatis. Journal of Agricultural Research, II: 251-286 July IS, 1914- ^ Appel, Otto, and Wollenweber, H. W. : Grundlage einer Monograph der Gattung Fusarium Link Arb. Biol. Anst. f. Land. u. Forst., Bd. 8, Heft. 1, pp. 1-207; Phytopathology III: 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 perfectl
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1917
