Susceptibility of Conifer Seedlings to Phytophthora Root Rot

Susceptibility of Conifer Seedlings to Phytophthora Root Rot*

Highly Tolerant

Western Redcedar

Lodgepole Pine

Ponderosa Pine

Western Larch

Tolerant

Incense Cedar

Sitka Spruce

Engelmann Spruce

Western White Pine

Sugar Pine

Susceptible

White Fir

Grand Fir

Pacific Silver Fir

Douglas-fir

Highly Susceptible

Mountain Hemlock

Western Hemlock

Noble Fir

California Red Fir

* Reference Campbell, S.J. and Hamm, P.B. 1989. Susceptibility of Pacific Northwest conifers to Phytophthora root rot. Tree Planters’ Notes 40:15-18.