. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 458 FUNGOUS DISEASES OF PLANTS the variety of host plants upon which it is reported. This fungus has been found practically throughout the world where trees grow. It is unquestionably more abundant in humid climates, yet minor or nonpersistent, unfavorable conditions do not readily affect it. This Polyporus is of special interest because of its occurrence upon a large variety of trees. Deciduous trees are more commonly attacked, yet both in Europe and America it is not infrequently
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 458 FUNGOUS DISEASES OF PLANTS the variety of host plants upon which it is reported. This fungus has been found practically throughout the world where trees grow. It is unquestionably more abundant in humid climates, yet minor or nonpersistent, unfavorable conditions do not readily affect it. This Polyporus is of special interest because of its occurrence upon a large variety of trees. Deciduous trees are more commonly attacked, yet both in Europe and America it is not infrequently found upon conifers. It is perhaps oftener noticed upon such. Fig. 226. Polyporus sulphureus on Exposed Roots of a Living Tree (Photograph by L. H. Childers) forest and shade trees as oak, walnut, butternut, ash, black locust, poplar, and willow. Among orchard trees the cherry in old orchards is a common host, but pear and apple trees are also susceptible. Moreover, the sporophores of this fungus may appear upon fallen trunks and stumps, and it appears to be true that the mycelium of the fungus may develop extensively in fallen trunks. The coniferous trees upon which it has been more frequently observed are the larch in Europe and the hemlock and spruce in 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 Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn
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