. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 115 reproductive structures in the form of conidia. These may be borne singly or in rows on simple or branched conidiophores. The conidiophores may be single or variously grouped in columns or layers. Figs. 352, 378, 382. In some instances they are very. Fig. 75.—Sphsrotheca castagnei. Fertilization and de- velopment of the perithecium. Og= oogonium, an= antheridium, st= stalk-cell. 6 as the ascogonium derived from the oogonium. After Harper. short, innate; again they are long, loose or floccosc.
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 115 reproductive structures in the form of conidia. These may be borne singly or in rows on simple or branched conidiophores. The conidiophores may be single or variously grouped in columns or layers. Figs. 352, 378, 382. In some instances they are very. Fig. 75.—Sphsrotheca castagnei. Fertilization and de- velopment of the perithecium. Og= oogonium, an= antheridium, st= stalk-cell. 6 as the ascogonium derived from the oogonium. After Harper. short, innate; again they are long, loose or floccosc. They may emerge through stomata singly or in tufts or they may form sporo- genous cushions below the epidermis or again they may be borne inside of a hollow structure, the pycnidium, which covers them. Chlamydospores are also found. One or several distinct types of sporification may belong to one species of Ascomycete. These dif- ferent forms of spores may appear simultaneously on the same myce- lium or they may follow in definite succession regulated by the changes in environment, or again one or more of the spore forms belonging to the Hfe history of the fun- gus may be omitted for long intervals to appear only as the result of stimuli of which little is yet known. The conidia and chlamydospores are asexual spores. Sexuality. 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
