Cedar Laminated Butt Rot

Phellinus wierii (Murr.) Gilbertson

From: Field Guide to Diseases and Insect Pests of Idaho and Montana Forests, USDA Forest Service Northern Region, Publication Number R1-89-54

Hosts. – Western redcedar. (See discussion of Laminated Root and Butt Rot of other species.) Distribution. – Range of host in Idaho and Montana. Damage. – Heartrot of stem; often resulting in total cull. Identification. – The rot forms concentric rings of variously rotted heartwood (fig. 3). These
	Figure 3 - Laminated Butt Rot in western cedar log forms concentric rings of decay.

Similar damages. – Cedar brown pocket rot is most often confused with this damage. The decay types are distinctive when examined closely.

Link to Table 2 – Comparison of Common Root Diseases

Link to Images in Forestry Images

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. Handbk. No. 521, 206 p. 

Boyce, J. S. 1961. Forest Pathology. McGraw-Hill Book Co., New York, NY. 572 p.

Nelson, E. E., N. E. Martin, and R. E. Williams. 1981. Laminated root rot of western conifers. USDA For. Serv., For. Ins. & Dis. Leaflet 159, 6 p.

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