Laminated Root Rot
Coniferiporia sulphurascens
9 host plants
Last updated
Data Coverage 3 of 6 dimensions
Western hemlock or Douglas-fir shows yellowing, reduced growth, and eventually topples. Coniferiporia sulphurascens causes laminated rot, visible as pages of rot separating at growth rings. The fungus spreads through root contact from stump to stump. Avoid building near infection centers; remove healthy trees adjacent to confirmed diseased ones to stop spread.
Avoid building near centers of root-rot infection. Construction activity usually worsens the situation and can lead to tree failures and property loss.
Quick Reference
Causal Agent
Coniferiporia sulphurascens
Host Plants
9
Management
Cultural Controls
- Avoid building near centers of root-rot infection.
- Construction activity usually worsens the situation and can lead to tree failures and property loss.
- Remove healthy appearing trees that are next to confirmed infected trees in the landscape, as these are likely to be infected as well.
- This will reduce root-to-root spread to other trees that are not yet infected.
- In mixed-species areas, favor resistant species such as cedar, pine, or hardwoods when planting, thinning, or harvesting.
- Excavating infected stumps has helped on industrial land.
Host Plants (9)
Pseudotsuga macrocarpa Bigcone Douglas-fir Pseudotsuga menziesii Douglas-fir Pseudotsuga menziesii var. glauca Rocky Mountain Douglas-fir Blue Douglas-fir Inland Douglas-fir Colorado Douglas-fir Pseudotsuga wilsoniana Taiwan Douglas-fir Tsuga canadensis Canadian Hemlock, Eastern Hemlock Tsuga canadensis var. pendula Weeping Hemlock Tsuga diversifolia Northern Japanese Hemlock Tsuga heterophylla Western Hemlock Tsuga mertensiana Mountain Hemlock