Plant Symptom Photos - Sudden Oak Death

More details about Hosts and Symptoms.

Alleghany viburnum

Healthy

Alleghany viburnum flowering

Healthy

Alleghany viburnum fruiting

Healthy

American cranberry viburnum

Healthy. Also known as European cranberrybush viburnum

Andrew's clintonia bead lily

May 04 - Reported by David Rizzo, University of California, Davis, CA

Andrew's clintonia bead lily

May 04 - Reported by David Rizzo, University of California, Davis, CA

Andrew's clintonia bead lily

May 04 - Reported by David Rizzo, University of California, Davis, CA

Anise magnolia

Feb 08 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Arctostaphylos glandulosa

Arctostaphylos virgata

Arctostaphylos virgata foliar symptoms

Ardisia

Jan 06 - Reported by Canadian Food Inspection Agency,Canada (CFIA)

Ardisia

Jan 06 - Reported by Canadian Food Inspection Agency,Canada (CFIA)

Banana shrub

April 08 - Reported by CA Department of Food and Agriculture (CDFA

Banana shrub

April 08 - Reported by CA Department of Food and Agriculture (CDFA

Bay laurel (L. nobilis)

Healthy

Bayleaf currant

Jan 09 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Big leaf maple

Petiole lesion

Big leaf maple

Bilberry

Feb 09 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Birch

Bleeding lesion caused by P. ramorum

Blackberry

Blueblossom

April 06 - Reported by David Rizzo, University of California, Davis (UCD)

Blueblossom

April 06 - Reported by David Rizzo, University of California, Davis (UCD)

Buford holly

California bay laurel

Fresh P. ramorum infections

California bay laurel

California black oak

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

California black oak

Culture confirmed, P. ramorum twig cankers from Annadel State Park, Santa Rosa, CA in July 2012.

California black oak

Culture confirmed, P. ramorum twig cankers from Annadel State Park, Santa Rosa, CA in July 2012.

California buckeye

California coffeeberry

California hazelnut

Shoot dieback. Dec 02 - Reported by David Rizzo, University of California, Davis (UCD)

California hazelnut

Shoot dieback. Dec 02 - Reported by David Rizzo, University of California, Davis (UCD)

California hazelnut

Shoot dieback. Dec 02 - Reported by David Rizzo, University of California, Davis (UCD)

California hazelnut

Dec 02 - Reported by David Rizzo, University of California, Davis (UCD)

California hazelnut

Dec 02 - Reported by David Rizzo, University of California, Davis (UCD)

California honeysuckle

Infected honeysuckle leaves

California honeysuckle

Infected honeysuckle leaves

California honeysuckle

Infected honeysuckle leaves

California maidenhair fern

California nutmeg

Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

California nutmeg

Shoot dieback. Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

California nutmeg

Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

California nutmeg

Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

California wood fern

May 04 - Reported by David Rizzo, University of California, Davis (UCD)

Camellia - all species, hybrids and cultivars

Camphor

Naturally infected Camphor leaves

Camphor tree

May 06 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Canyon live oak

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Canyon live oak

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Canyon live oak

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Canyon live oak

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Castanopsis

Aug 06 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Chaparral pea

Cherry laurel, Prunus laurocerasus

Also called English laurel. Photo courtesy of Marianne Elliott, Washington State University.

Cherry laurel, Prunus laurocerasus

Also called English laurel. Photo courtesy of Marianne Elliott, Washington State University.

Chinese guger tree, needlewood

Nov 06 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Chinese redbud

30 May 2008 Cercis chinense - redbud changed to correctly read Cercis chinensis - Chinese redbud. April 08 - Reported by Canadian Food Inspection Agency,Canada (CFIA)

Chinese witchhazel

Jan 05 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Chinquapin

Chinquapin bark

Coast live oak

Canker. Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Coast live oak

Bleeding. Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Coast redwood

Redwood tip

Coast redwood

Needle and stem necrosis

Coast redwood

Needle and stem necrosis

Cornus capitata

Cornus capitata “Mountain Moon”. S. Griffard, Humboldt Co. Ag. Dept.

Cornus capitata

Cornus capitata “Mountain Moon”. S. Griffard, Humboldt Co. Ag. Dept.

Cornus Norman Haddon

Aug 06 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Cotoneaster pannosus

Cotoneaster pannosus. Credit: NORS-DUC.

Cowberry, Lingon berry, Mountain cranberry

April 09 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Creeping Oregon grape

Daphniphyllum glaucescens

Feb 09 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Daphniphyllum glaucescens

Feb 09 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Daphniphyllum glaucescens

Feb 09 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

db_Rhodo_rhodmolt31

Delavay osmanthus, Delavay tea olive

Tip dieback. Jan 07 - Reported by Washington State Department of Agriculture, Olympia, WA

Douglas-fir

Wilted Douglas fir shoot

Douglas-fir

Twig canker

Douglas-fir

Dead Douglas fir leader shoot

Drooping leucothoe

Oct 03 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Drooping leucothoe

Oct 03 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Drooping leucothoe

Oct 03 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Dwarf English laurel

Jan 07 - Reported by Washington State Department of Agriculture, Olympia, WA

Eastern joy lotus tree

July 06 - Reported by Canadian Food Inspection Agency,Canada (CFIA)

English laurel, cherry laurel

Jan 07 - Reported by Washington State Department of Agriculture, Olympia, WA

European ash

European beech

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

European holly

April 09 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

European turkey oak

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

European yew

Evergreen huckleberry

Young huckleberry shoot infection

Evergreen huckleberry

Shoot dieback

Evergreen huckleberry

Shoot dieback

Evergreen huckleberry

Dieback

Evergreen maple

Aug 05 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

False solomon's seal

Fetterbush

AKA Coast leucothoe. Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Formosa firethorn

April 04 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Gaultheria shallon

P. ramorum symptoms on Gaultheria shallon in a Washington County (OR) nursery, spring 2023. Photo: ODA.

Goat willow

Healthy

Grand Fir

Bark canker symptoms seen in the UK

Grand Fir

Grand fir

June 03 - Reported by CA Department of Food and Agriculture (CDFA)

Grand fir

June 03 - Reported by CA Department of Food and Agriculture (CDFA)

Grand fir

June 03 - Reported by CA Department of Food and Agriculture (CDFA)

Griselinia

Holly olive

June 06 - Reported by CA Department of Food and Agriculture (CDFA)

Holm oak

Foliar tree branch lesion

Holm oak

Foliar leaf necrosis

Holm oak

Foliar blight

Holm oak

Foliar aerial blight

Horse chestnut

Hybrid roses

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Hybrid witchhazel

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Japanese evergreen oak

May 06 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Japanese larch

Foliar symptoms

Japanese larch

Resinosis

Japanese larch

Dieback

Japanese oak

April 09 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Kinnikinnik, bearberry

Jan 07 - Reported by Washington State Department of Agriculture, Olympia, WA

Kobus magnolia

Feb 08 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Kousa dogwood

Sep 08 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Kousa dogwood

Sep 08 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Kousa dogwood

Sep 08 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Kousa dogwood

Sep 08 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Kousa dogwood

Sep 08 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Kousa dogwood

Sep 08 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Lilac

Lily tree

Loebner magnolia

Jan 05 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Loropetalum

July 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Madrone

Madrone stem lesion

Madrone

Magnolia

Feb 08 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Magnolia

Feb 08 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Magnolia grandiflora

Kaitlin Gerber, ODA

Magnolia grandiflora

Kaitlin Gerber, ODA

Manzanita

Manzanita (A. columbiana)

Feb 06 - Reported by David Rizzo, University of California, Davis (UCD)

Manzanita (A. columbiana)

Feb 06 - Reported by David Rizzo, University of California, Davis (UCD)

Manzanita (A. columbiana)

Feb 06 - Reported by David Rizzo, University of California, Davis (UCD)

Manzanita (A. columbiana)

Feb 06 - Reported by David Rizzo, University of California, Davis (UCD)

Manzanita (A. manzanita)

Feb 06 - Reported by David Rizzo, University of California, Davis (UCD)

Mexican orange

Jan 09 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Michelia

Healthy

Michelia

April 09 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Michelia

April 09 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Michelia

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Michelia

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Molinadendron sinaloense

Mountain laurel

Mountain laurel - all species, hybrids and cultivars

Myrtle-leafed Distylium

July 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Ninebark

Oct 07 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Northern red oak

Canker. Nov 03 - Reported by Plant Protection Service, Wageningen, Netherlands

Oleander

June 06 - Reported by CA Department of Food and Agriculture (CDFA)

Oregon ash

Leaf lesions. Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

Oregon ash

Leaf lesion. Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

Oregon ash

Leaf lesion. Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

Oregon grape

Aug 07 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Oregon grape

Aug 07 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Oregon grape, Berberis aquifolium

Courtesy of Marianne Elliott, Washington State University

Oriental holly

July 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Osmanthus

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Pacific yew

Wilted shoot tips. May 03 - Reported by David Rizzo, University of California, Davis (UCD)

Pacific yew

May 03 - Reported by David Rizzo, University of California, Davis (UCD)

Pacific yew

May 03 - Reported by David Rizzo, University of California, Davis (UCD)

Pacific yew

Canker exposed. May 03 - Reported by David Rizzo, University of California, Davis (UCD)

Pacific yew

Pacific yew branch. May 03 - Reported by David Rizzo, University of California, Davis (UCD)

Pacific yew

May 03 - Reported by David Rizzo, University of California, Davis (UCD)

Periwinkle, Vinca minor

Courtesy of Marianne Elliott, Washington State University

Persian ironwood

Pieris

Pieris spp.

P. ramorum symptoms on Pieris spp. in a Washington County (OR) nursery, spring 2023. Photo: ODA.

Planetree maple

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Poison oak

Dec 02 - Reported by Everett Hansen, Oregon State University (OSU)

Poison oak

Dec 02 - Reported by Everett Hansen, Oregon State University (OSU)

Poison oak

Dec 02 - Reported by Everett Hansen, Oregon State University (OSU)

Poison oak

Dec 02 - Reported by Everett Hansen, Oregon State University (OSU)

Poison oak

Dec 02 - Reported by Everett Hansen, Oregon State University (OSU)

Portuguese laurel cherry

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Prunus laurocerasus

P. ramorum symptoms on Prunus laurocerasus in a Washington County (OR) nursery, spring 2023. Photo: ODA.

Purple magnolia

Feb 08 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Red fir

Jan 06 - Reported by Gary Chastagner, Washington State University, Puyallup, WA

Red huckleberry, Vaccinium parvifolium

Courtesy of Marianne Elliott, Washington State University

Red lotus tree

Aug 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Red tip or Fraser's photinia

Healthy

Red tip or Fraser's photinia

Redwood ivy

Inside-out flower new infections. Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

Redwood ivy

Inside-out flower. Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

Rhododendron

P. ramorum symptoms on Rhododendron in an Oregon nursery, spring 2023. Photo: ODA.

Rhododendron

P. ramorum symptoms on Rhododendron in an Oregon nursery, spring 2023. Photo: ODA.

Rhododendron

P. ramorum symptoms on Rhododendron in an Oregon nursery, spring 2023. Photo: ODA.

Roble beech

Dec 04 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Rugosa rose

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Salal, Gaultheria shallon

Emerging foliage. Photo courtesy of Marianne Elliott, Washington State University.

Salal, Gaultheria shallon

Mature foliage. Photo courtesy of Marianne Elliott, Washington State University.

Salal, Oregon wintergreen

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Salmonberry

Dec 02 - Reported by Everett Hansen, Oregon State University (OSU)

Saucer magnolia

Jan 05 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Scotch Heather

Healthy

Scribbly gum

Aug 06 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Sessile oak

Healthy. Aug 05 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Shreve's oak

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Silk tassel tree, coast silk tassel

Aug 07 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Silk-tassel bush

Summer 2010 - reported by University of California, Davis

Southern magnolia

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Southern magnolia

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Southern magnolia

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Southern red oak

Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Spicebush

May 05 - Reported by David Rizzo, University of California, Davis (UCD)

Spicebush

Leaf necrosis. May 05 - Reported by David Rizzo, University of California, Davis (UCD)

Spicebush

Leaf necrosis. May 05 - Reported by David Rizzo, University of California, Davis (UCD)

Spike witch hazel

Nov 07 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Spiked speedwell

Spreading euonymus

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Star jasmine

Leaf Spot

Star jasmine

Early dehiscence

Star magnolia

Jan 05 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)

Strawberry tree

Symptoms on twigs seven days after inoculation with a mycelium plug of Phytophthora ramorum. Dec 02 - Reported by Gary Chastagner, Washington State University, Puyallup, WA

Striped bark maple

Jan 06 - Reported by Canadian Food Inspection Agency, Canada (CFIA)

Sweet Chestnut

Leaf lesions

Sweet Chestnut

Leaf lesions

Sweet Cicely

Aug 05 - Reported by David Rizzo, University of California, Davis (UCD)

Sweet olive

Infected

Sweet olive

Infected

Sweet olive

Infected

Sweet olive

June 06 - Reported by CA Department of Food and Agriculture (CDFA)

Tanoak

Sheperd's crook. Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Tanoak

Canker. Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Tanoak

Bleeding. Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Tanoak

Infected tanoak with stem lesion forming. Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92

Tanoak

Chlorotic tanoak. Unmanufactured wood and wood products, including firewood, logs, and lumber are regulated. See 7 CFR 301.92.

Toyon

Viburnum - all species, hybrids and cultivars

Victorian box

Dec 02 - Reported by Matteo Garbelotto, University of California, Berkeley (UCB)

Vine maple

Petiole lesions. Feb 06 - Reported by David Rizzo, University of California, Davis (UCD)

Vine maple

Feb 06 - Reported by David Rizzo, University of California, Davis (UCD)

Vine maple

Closeup of petiole legions. Feb 06 - Reported by David Rizzo, University of California, Davis (UCD)

Western Hemlock

Top dieback caused by P. ramorum infecting and girdling the tops of the trees

Western maidenhair fern

Western starflower

Western swordfern

Polystichum munitum; associated host as of August 2022; Photo credit: Annie Debauw

White fir

Oct 05 - Reported by CA Department of Food and Agriculture (CDFA)

Winter's bark

Healthy. July 04 - Reported by Department for Environment, Food and Rural Affairs, UK (DEFRA); (April 2009) Food and Environment Research Agency (FERA)