Juniper Cultivar Susceptibility

Juniper (Juniperus spp.) — Cultivar Susceptibility

Cultivar

Phytophthora

Root Rot1

Phomopsis

Twig Blight2

Kabatina

Tip Blight3

Juniperus chinensis

Armstrongii

?

I

S

Aurea Gold Coast

S

?

R

Blaauw

?

I

?

Maneyi

S

I

R

Pfitzeriana

S

I

R

Pfitzeriana Aurea

?

R

R

Pfitzeriana Compacta

?

I

?

San Jose

S

I

R

Sargenti Glauca

?

?

R

Sargenti Viridis

?

?

R

Torulosa

?

S

?

Wintergreen

?

I

R

Juniperus conferta

?

S

?

Juniperus horizontalis

Bar Harbor

I

S

S

Blue Horizon

?

?

S

Hughes

?

I

?

Prince-of-Wales

VS

I

?

Wiltonii

VS

I

S

Juniperus procumbens

Nana

S

I

R

Juniperus sabina

Tamariscifolia

S

S

R

Juniperus scopulorum

Wichita Blue

?

S

S

Juniperus squamata

Expansa Parsoni

?

?

R

Juniperus virginiana

Cupressifolia

?

I

?

Skyrocket

?

?

S

I = Intermediate susceptibility, S = Susceptible, R = Resistant, VS = Very susceptible

1 Observations from local nurseries

2Schoeneweiss, D.F. 1969. Susceptibility of evergreen hosts to the juniper blight fungus, Phomopsis junipervora, under epidemic conditions. Journal of American Society of Horticultural Science 94:609-611.

3Perry, R.G. and J.L. Peterson. 1982. Susceptibility and response of juniper species to Kabatina juniperi infection in New Jersey. Plant Disease 66:1189-1191. Note Kabatina tip blight is rare in Oregon but more common in eastern Washington.