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The Value of Rot and Decay The Value of Rot and Decay
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Decay Fungi Decay Fungi
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Rusts Rusts
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Dwarf Mistletoe Dwarf Mistletoe
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Notes Notes
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Cite
Abstract
This chapter discusses the wood-destroying fungi that cause wood to rot, decompose, or decay. These fungi are vital in the maintenance of living, growing forests. Without them, dead woody debris, fallen trees, logs, branches, and twigs would accumulate on the forest floor year after year without end. Decay fungi are an entirely different set of fungus species than those forming mycorrhizae. The fruiting body of most decay fungi is known as a conk or shelf fungus. A conk grows on the surface of its tree host, and its hyphae grow directly into the tree's tissues without touching the soil. Most of the decay fungi are polypores (family Polyporaceae), whose spores are liberated through numerous fine pores on the lower surface of the cap or shelf. Red-belted (also known as red-banded) polypore (Fomitopsis pinicola) attacks the majority of conifers. The fungus attacks dead trees, producing reddish brown, rotted wood that is divided first into neat cubes, which later crumble. Other conifer parasites are rust fungi and a genus of parasitic flowering plants called dwarf mistletoes.
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