Taiwan Douglas-fir
Pseudotsuga wilsoniana
Pinaceae · coniferous tree · introduced
Last updated
Data Maturity Structured Multiple sources. Expert review underway.
Watch for this season
RustHigh
Aecial Stage (Alternate Host)
Cooley spruce gall adelgidHigh
Spring Feeding
Pine needle scaleHigh
Crawler Emergence
Armillaria Root RotModerate
Active Below-ground Growth
+ 1 more — see full disease and pest lists below
Quick Facts
Height
65–80 ft
Light
Full Sun
Hardiness
Zone Zones 7a–8b
Origin
China and Taiwan
Diseases — Regionally Documented (12)
Leptographium wageneri Black-Stain Root Disease Gray Mold [VERIFY] Lower Stem Canker Rhabdocline pseudotsugae Rhabdocline needle cast Needle Cast, Swiss Multiple genera (Melampsoridium, Thekopsora, Naohidemyces... Rust Botryosphaeria corticis Stem Canker Phoma eupyrena Upper and Lower Stem Canker (Phoma Blight) Yellow-green Mottle Syndrome Diaporthe phaseolorum Upper stem canker Coniferiporia sulphurascens Laminated Root Rot Armillaria spp. — primarily A Armillaria Root Rot
Pests — Regionally Documented (12)
Aphidoidea Aphid Coccus hesperidum Brown soft scale Dioryctria spp. Coneworm Adelges cooleyi Cooley spruce gall adelgid Contarinia pseudotsugae Douglas-fir needle midge Orgyia pseudotsugata Douglas-fir tussock moth Cylindrocopturus furnissi Douglas-fir twig weevil Chionaspis pinifoliae Pine needle scale Synanthedon novaroensis Pitch moth Lophocampa argentata Silverspotted tiger moth Oligonychus ununguis Spruce spider mite Synanthedon sequoiae Sequoia pitch moth