. Diseases of economic plants . Plant diseases. DISEASES OF ECONOMIC PLANTS The pore-bearing sporophores are hoof-shaped, smooth above, and concentrically ridged and gray. Below they are red-brown. Rot {Fames ap- planatus (Pers.) Wallr.). â The shelving, pore- bearing sporo- phores are very large, woody, and grayish to brown above, and are commonly found on dead wood, more rarely upon live trees. Rot (Poly- porus pinicola (Schwartz) Fr.). â The causal fungus is of world-wide dis- tribution upon â conifers, espe- cially spruce, pine, fir, and hemlock. It occurs also upon birches and other decid
. Diseases of economic plants . Plant diseases. DISEASES OF ECONOMIC PLANTS The pore-bearing sporophores are hoof-shaped, smooth above, and concentrically ridged and gray. Below they are red-brown. Rot {Fames ap- planatus (Pers.) Wallr.). â The shelving, pore- bearing sporo- phores are very large, woody, and grayish to brown above, and are commonly found on dead wood, more rarely upon live trees. Rot (Poly- porus pinicola (Schwartz) Fr.). â The causal fungus is of world-wide dis- tribution upon â conifers, espe- cially spruce, pine, fir, and hemlock. It occurs also upon birches and other deciduous trees. Entrance is made through woimds of any kind. The rotted wood is brittle, cracked, and permeated by numerous sheets of mycelium. In early stages of decay it passes through red-brown to dark-brown, then small, white areas of numerous shapes and irregu-. 182. â Fomes applanatus upoa trunk of dead tree. After 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; Hall, John Galentine, 1870-. New York : Macmillan
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
