. The fungi which cause plant disease . Plant diseases; Fungi. 662 THE FUNGI WHICH CAUSE PLANT DISEASE O. omnivorum Sh.'"^' '-^-*'' Mycelium dirty yellow; sometimes whitish when young, grow- ing in the vascular bundles of the host; hyphse forming strands and spreading from them, producing a rather dense arachnoid layer on the surface of the host and bearing 1 to 4 branches arising. Via. 448.—S. rolfsii, sterile mycelium growing on carrot. After Stevens and Hall. and growing at right angles from the same point near the ends, 3 to 5 ;u in diameter, tapering toward the It causes root
. The fungi which cause plant disease . Plant diseases; Fungi. 662 THE FUNGI WHICH CAUSE PLANT DISEASE O. omnivorum Sh.'"^' '-^-*'' Mycelium dirty yellow; sometimes whitish when young, grow- ing in the vascular bundles of the host; hyphse forming strands and spreading from them, producing a rather dense arachnoid layer on the surface of the host and bearing 1 to 4 branches arising. Via. 448.—S. rolfsii, sterile mycelium growing on carrot. After Stevens and Hall. and growing at right angles from the same point near the ends, 3 to 5 ;u in diameter, tapering toward the It causes root rot on almost any kind of plant including among its hosts a large variety of trees. The first description was by Pammel in a Texas Bulletin; a later one was by Shear. The fungus destroys the smaller rootlets, cortex of older roots and invades the vascular system and medullary rays, resulting in wilt and death. It may be seen as dirty yellowish strands or as a thin weft superficially. Sclerotia-like Ijodies appear on the roots often at. 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
