Indian Paint Fungus
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Contents |
Hosts
Grand fir, western hemlock and, occasionally, subalpine fir.
Distribution
Range of hosts in Idaho and western Montana. Damage. – Heartrot of stems. Decay extends about 16 feet in either direction from a conk on the stern. Three to four punk knots or two to three conks scattered along the stern indicate complete cull.
Identification
Conks, which can reach sizes of a foot in diameter, develop under branches or branch stubs. They are woody, hoof-shaped, and toothed on the underside (fig. 7). The upper surface is dark brown or black, lower surface is gray, and context is brick red. Punk knots have brick red tissue within. The rot is tan and water soaked at first, becoming yellow to orange and stringy (fig. 8).
Similar damages
Phellinus pitii also causes a stem rot in these species, but both the rot and conk appearances are sufficiently different from E. tinctorium to make confusion unlikely.
Comparison of Common Heartrots in Species Other Than Western Redcedar
| Fungus | Hosts | Shape | Upper Surface | Lower Surface | Context | Characteristic |
|---|---|---|---|---|---|---|
| Echinodontium tinctorium | 1. GF, WH
2. SAF | Hoof-under branch | Brown; woody | Tan; teeth projecting downward | Orange | Decay yellow orange, stringy |
| Phellinus pini | 1. DF, LPP,WL
2. Other conifers | Hoof or flat
on bark | Dark brown | Cinnamon to tan | Cinnamon | Stringy decay with pro-nounced white pockets, punk knots on tree stem, red-brown dis-
coloration in heartwood. |
| Phaeolus schweinitzii | 1. DF
2. Other conifers | Thick shelf or on ground; non-woody | Brown; velvety | Green-fresh; Brown-old large pored | Brown | Brown cubical decay of heartwood; thin, resinous felts some-
times in shrinkage cracks of decay. Root and butt rot |
| Fomitopsis officionalis | 1. WL,PP
2. Other conifers | Hoof or cylindric large;
chalky consistency | Yellow, white or cream | Yellow or white;pored | Yellow white | Brown cubical decay of heartwood only. Thick, white felts in shrinkage cracks of decay. |
| Fomitopsis pinicola | All dead conifers | Thick shelf or hoof;corky consistency | Brown with red "belt" along margin | Cream;small pored | Cream | Brown cubical decay of both sapwood and heartwood, dead trees and stumps |
Gallery
 Photo by USDA Forest Service Archive, USDA Forest Service, Bugwood.org |
References
Anonymous. 1982. For. Insect & disease identification and management. USDA For. Serv., Northern Region; Idaho Dept. of Lands, Insect and Disease Control; Montana Dept. of State Lands, Division of Forestry. 192 p.
Bega, R.V. 1978. Diseases of Pacific Coast conifers. USDA For. Serv. Ag. Hndbk. No. 521, 206 p.
Boyce, J.S. 1961. Forest Pathology. McGraw-Hill Book CO., New York, NY. 572 p.
Hepting, G.E. 1971. Diseases of forest and shade trees of the United States. USDA For. Serv. Ag. Hndbk. No. 386, 658 p.
Kimmey, J.W. 1964. Heartrots of western hemlocl. USDA For. Serv., For. Pest Leaflet 90, 7 p. From: Field Guide to Diseases and Insect Pests of Idaho and Montana Forests, USDA Forest Service Northern Region, Publication Number R1-89-54
