. Manual of tree diseases . Trees. 114 MANUAL OF TREE DISEASES Symptoms. The decayed wood is yellowish and cracks radially and tangen- tially. The rot is uniform and in the final stages it is very light in weight and easily crushed to a powder. The sporophores of the causal fungus are very common on birch. They are corky annual bodies and are quickly destroyed by insects. From the point of attachment to the trimk, they. Fig. 13. — Fruiting-body of Polyporus betuUnus. hang as bell-shaped bodies varying from three to ten or more inches across. The outer surface of the sporophore is smooth and li
. Manual of tree diseases . Trees. 114 MANUAL OF TREE DISEASES Symptoms. The decayed wood is yellowish and cracks radially and tangen- tially. The rot is uniform and in the final stages it is very light in weight and easily crushed to a powder. The sporophores of the causal fungus are very common on birch. They are corky annual bodies and are quickly destroyed by insects. From the point of attachment to the trimk, they. Fig. 13. — Fruiting-body of Polyporus betuUnus. hang as bell-shaped bodies varying from three to ten or more inches across. The outer surface of the sporophore is smooth and light to dark mottled gray in color (Fig. 13). The margin is incurved and projects below the under surface. The lower siu-face is white or yellowish and roughened by ragged projec- tions. The pores are small and the entu-e layer of tubes separates easily from the 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 Rankin, W. Howard (William Howard), b. 1888. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918
