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Below is a cache of http://www.puyallup.wsu.edu/plantclinic/resources/pdf/1999hostpathogenindex.pdf. It's a snapshot of the page taken as our search engine crawled the Web.
The web site itself may have changed. You can check the current page or check for previous versions at the Internet Archive. Yahoo! is not affiliated with the authors of this page or responsible for its content. WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Shrubs & Vines - Fungal Diseases WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Shrubs & Vines - Fungal Diseases Latin Name Common Name Disease Pathogen Daphne buckwoodii Daphne Black root rot Thielaviopsis basicola Buxus sempervirens Boxwood Phytophthora root rot Phytophthora sp. Boxwood (Winter Gem?) Phytophthora root rot Phytophthora sp. Ceanothus sp. Wild lilac Phyllosticta leaf spot Phyllosticta sp. Choisya ternata Mexican orange Root rot Phytophthora sp.,
Rhizoctonia sp. Clerodendrum trichotomum Harlequin glorybower Gray mold Botrytis sp. Corylus cornuta Western hazelnut Phytophthora root rot Phytophthora sp. Cotoneaster sp. Cotoneaster Botrytis blight Botrytis sp. Euonymus sp. Euonymus Armillaria root rot Armillaria sp. Gaultheria shallon Salal Leaf spot Phyllosticta sp. Salal Leaf spot Phyllosticta sp. Salal Leaf spots Mycosphaerella sp.,
Phyllosticta sp. Salal seedlings (plugs) Botrytis blight,
Phytophthora root rot Botrytis sp.,
Phytophthora sp. Salal Gray mold,
Stem canker Botrytis sp.,
Fusicoccum sp.,
Coniothyrium sp. Hedera helix English ivy Anthracnose,
Phyllosticta leaf spot Colletotrichum sp.,
Phyllosticta sp. Iberis sp. Candytuft Botrytis blight Botrytis sp. Ilex verticillata Holly Phomopsis canker Phomopsis sp. Lonicera sp. Honeysuckle Phoma leaf spot Phoma sp. Photinia sp. Photinia Leaf spot Entomosporium mespili Pyracantha sp. Firethorn Scab Spilocaea pyracanthae Rhododendron sp. Rhododendron Bud blight Briosia azaleae Rhododendron Powdery mildew Microsphaera sp. Rhododendron Botrytis shoot blight Botrytis cinerea Rhododendron Gray blight Pestalotiopsis sp. Rhododendron Armillaria root rot Armillaria sp. Rhododendron
(Ann Rose Whitney) Phytophthora root rot Phytophthora sp. Rhododendron sp.,
Acer sp. Various bonzai - azalea,
maple Pythium root rot Pythium sp. Rosa sp. Rose Botrytis bud/twig blight Botrytis sp. Rose Black spot,
Gray mold Marssonina rosae,
Botrytis cinerea Rose Bud blight,
Canker Botrytis sp.,
Diaporthe sp. Syringa sp. Lilac (Katherine
Havemeyer) Pythium damping off Pythium sp. Viburnum sp. Viburnum Fungal leaf spot Cercospora sp. Viburnum Cercospora leaf spot Cercospora sp. Shrubs & Vines - Bacterial Diseases Latin Name Common Name Disease Pathogen Photinia sp. Photinia Pseudomonas blight Pseudomonas syringae Rosa sp. Rose Hairy root Agrobacterium rhizogenes Page 1 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Rose (Brigadoon) Hairy root Agrobacterium rhizogenes Viburnum sp. Viburnum Bacterial blight Pseudomonas syringae pv.
v<i>iburni Shrubs & Vines - Viral Diseases Latin Name Common Name Disease Pathogen Rosa sp. Rose (Westerland) Possible rose mosaic? Rose mosaic complex Broadleaf Trees - Fungal Diseases Latin Name Common Name Disease Pathogen Acer circinatum Vine maple Verticillium wilt Verticillium sp. Acer macrophyllum Bigleaf maple Verticillium wilt Verticillium sp. Acer palmatum Laceleaf maple Verticillium wilt Verticillium sp. Japanese maple Verticillium wilt Verticillium sp. Japanese maple Verticillium wilt Verticillium sp. Japanese maple Nectria canker Nectria galligena Acer palmatum 'Ornatum' Japanese red laceleaf
maple Verticillium wilt Verticillium dahliae Acer sp. Coral maple Verticillium wilt Verticillium sp. Maple Verticillium wilt Verticillium sp. Vine maple Nectria canker Nectria sp. Arbutus menziesii Madrone Phytophthora root rot Phytophthora sp. Cercis canadensis Redbud Verticillium wilt Verticillium sp. Cornus Kousa Dogwood (Kousa) Powdery mildew Phyllactinia sp. Cornus nuttalli Dogwood Phytophthora root rot Phytophthora sp. Cornus nuttalli x C. Kousa Dogwood Powdery mildew Phyllactinia sp. Cornus sp. Dogwood Anthracnose Discula destructiva Cornus stolonifera Red-osier dogwood Anthracnose Discula destructiva Red-osier dogwood Septoria leaf spot Septoria sp. Crataegus sp. Native hawthorn Scab,
Phyllosticta leaf spot Venturia inaequalis,
Phyllosticia sp. Elaeagnus angustifolia Russian olive Verticillium wilt Verticillium sp. Nandina domestica Heavenly bamboo Phyllosticta leaf spot Phyllosticta sp. Oemleria cerasiformis Indian plum Leaf spot Cylindrosporium sp.,
Diaporthe sp. Populus tremuloides Quaking aspen Poplar leaf and shoot blight Venturia macularis Prunus serrulata
'Shirofugen' Japanese flowering cherry
'Shirofugen' Coryneum blight Wilsonomyces carpophilus Prunus sp. Flowering plum Brown rot Monilinia sp. Pyrus calleryana Ornamental pear White rot,
Phomopsis canker Botrysphaeria dothidae,
Phomopsis sp. Pyrus sp. Ornamental pear hybrid European canker,
Nectria twig blight Nectria galligena,
Nectria cinnabarina Quercus suber Cork oak (bonsai) Leaf spot Cylindrocarpon sp. Salix sp. Willow Leaf spot Cladosporium sp.,
Trichothecium sp. Salix matsudana 'Tortuosa' Willow (corkscrew) Black canker Collectrichum gloeosporioides Salix matsudana x alba Willow (Austee) Scab Venturia saliciperda Stewartia pseudocamellia Stewartia Leaf spot Coniothyrium sp.,
Phoma sp. Page 2 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Syringa sp. Lilac Gray mold,
Phyllosticta leaf spot Botrytis sp.,
Phyllosticta sp. Syringa vulgaris
(field samples) Lilac seedlings
(field samples) Damping-off/Root rot Phytophthora sp.,
Pythium sp.,
Thielaviopsis sp. Syringa vulgaris
(greenhouse samples) Lilac seedlings
(greenhouse samples) Damping-off/Root rot Phytophthora sp.,
Pythium sp.,
Thielaviopsis basicola Ulmus americanum American elm Dutch elm disease Ophiostoma ulmi American elm Dutch elm disease Ophiostoma ulmi Ulmus sp. Elm Dutch elm disease Ophiostoma ulmi Conifers - Fungal Diseases Latin Name Common Name Disease Pathogen Abies concolor White fir Fir rust,
Gray mold Uredinopsis pteridis,
Botrytis sp. Abies fraseri Fraser fir Phytophthora root rot Phytophthora sp. Fraser fir Fomes heart rot Heterobasidion annosum Fraser fir seedlings Phytophthora root rot Phytophthora sp. Abies grandis Grand fir Interior needle blight,
Rhizosphaera needle cast Unknown cause;
Rhizosphaera kalkhoffii Abies grandis & Abies
magnifica 'Shastensis' Grand fir & Shasta fir Grovesiella canker Grovesiella sp. Abies procera Noble fir Fomes heart rot Heterobasidion annosum Noble firs Possibly stringy butt rot
(yellow root rot) Perenniporia subacida Noble firs Stringy butt rot Perenniporia subacida Noble firs Stringy butt rot Perenniporia subacida Noble fir Phytophthora root rot Phytophthora sp. Noble fir Fomes heart rot Heterobasidion annosum Noble fir seedlings Phytophthora root rot Phytophthora sp. Abies procera & Abies
grandis Noble fir & Grand fir Phomopsis canker Phomopsis sp. Abies sp. Fir Armillaria root rot Armillaria sp. Araucaria araucana Monkey-puzzle tree Phyllosticta leaf spot Phyllosticta sp. Cedrus sp. Various bonzai - azalea,
maple, cedar Pythium root rot Pythium sp. Cedrus atlantica Blue atlas cedar Gray mold (tip blight) Botrytis sp. Atlas cedar Botrytis tip blight/gray mold Botrytis cinerea Blue atlas cedar Tip blight Botrytis sp.,
Pestalotiopsis sp. Cedrus deodara Deodar cedar Armillaria root rot Armillaria sp. Deodar cedar Gray mold Botrytis cinerea Juniperus horizontalis Juniper Tip blight Sclerophoma sp. Juniperus sabina
'Tamariscifolia' Juniper (Tam) Phomopsis twig blight Phomopsis juniperovora Juniperus sp. Juniper (Hollywood) Kabatina tip blight Kabatina thujae Juniper (Blue carpet) Phytophthora root rot Phytophthora sp. Larix decidua 'Pendula' European weeping larch Botrytis tip blight Botrytis sp. Pinus contorta Shore pine Lophodermella needle cast Lophodermella sp. Lodgepole pine Needle cast Lophodermium sp. Page 3 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Pinus densiflora &
P. strobus Japanese red pine &
white pine Needle cast Lophodermium sp. or
Lophodermella sp. Pinus flexis
' Vanderwolf' Vanderwolf pine Lophodermium needle cast Lophodermium nitens Pinus ponderosa Ponderosa pine Lophodermium needle cast Lophodermium seditiosum Pinus sp. Pine trees Lophodermium needle cast Lophodermium sp. Pinus sp., Abies sp. Pine, fir Armillaria root rot Armillaria sp. Pinus thunbergiana Japanese black pine Lophodermium needle cast Lophodermium sp. Pseudotsuga menziesii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir (Hollywood) Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Yellow-green mottle
syndrome, Swiss needle cast Unknown;
Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Laminated root rot Phellinus weirii Douglas fir Laminated root rot Phellinus weirii Douglas fir Laminated root rot Phellinus weirii Douglas fir Armillaria root rot Armillaria sp. Douglas fir Melampsora needle rust Melampsora occidentalis Thuja sp. Arborvitae Armillaria root rot Armillaria sp. Thuja heterophylla Western hemlock
seedlings Gray mold Botrytis sp. Thuja occidentalis
'Pyramidalis' Arborvitae (Emerald
Green 'Pyramidalis') Phytophthora root rot Phytophthora sp. Thuja plicata Cedar tree Armillaria root rot Armillaria sp. Western red cedar Armillaria root rot Armillaria sp. Thuja sp. Arborvitae Black canker Colletotrichum gloeosporiodies Tsuga heterophylla Western hemlock Phytophthora root rot Phytophthora sp. Western hemlock Armillaria root rot Armillaria sp. Flowers & Bulbs - Fungal Diseases Latin Name Common Name Disease Pathogen Ajuga sp. Ajuga Powdery mildew Erysiphe sp. Bacopa sp. Bacopa Gray mold Botrytis sp. Dahlia sp. Dahlia Gray mold Botrytis sp. Delphinium sp. Larkspur Gray mold,
Root rot Botrytis sp.,
Pythium sp. Larkspur Powdery mildew Erysiphe sp. Fuchsia sp. Fuchsia Gray mold/Botrytis blight Botrytis cinerea Helleborus orientalis Lenten rose Anthracnose,
Black leaf spot Colletotrichum sp.,
Coniothyrium sp. Hemerocallis spp. Daylily Anthracnose Colletotrichum sp. Iris versicolor &
Iris foetidissima Iris Rust Puccinia iridis Narcissus sp. Mini-daffodil bulbs Smoulder;
White mold Botrytis narcissicola,
Ramularia vallisumbrosae Paeonia sp. Peony Botrytis blight Botrytis sp. Page 4 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Pelargonium sp. Geranium cedar
basket/potting mix Slime mold,
Saprophytic Basidiomycete Myxomycete,
Basidiomycete Petunia hybrida Petunia Powdery mildew Oidium sp. Phlox maculata (Natacha) Phlox 'Natacha' Downy mildew Peronospora sp. Vinca minor Dwarf periwinkle Black root rot,
Stem canker Thielaviopsis basicola,
Phomopsis sp. Flowers & Bulbs - Bacterial Diseases Latin Name Common Name Disease Pathogen Delphinium sp. Larkspur Black leaf spot Pseudomonas delphinii Iris foetidissima Rhizomatous iris Bacterial soft rot Erwina carotovora subsp.
c<i>arotovora Lilium sp. Lily bulbs Bacterial fasciation Rhodococussus fascians Pelargonium hortorum &
P. peltatum Geraniums (ivy & zonal) Bacterial leaf spot/blight Xanthomonas hortorum pv.
pelargonii Pelargonium spp. Various geraniums Bacterial blight of geranium Xanthomonas hortorum pv.
pelargonii Geraniums Bacterial blight Xanthomonas hortorum pv.
pelargonii Flowers & Bulbs - Nematode Diseases Latin Name Common Name Disease Pathogen Bergenia sp. Bergenia Foliar nematodes Aphelenchoides sp. House Plants - Fungal Diseases Latin Name Common Name Disease Pathogen Begonia rex-cultorum Rex begonia Powdery mildew of begonia Microsphaera begoniae Fuchsia hybrida Fuchsia (Dusty Rose) Black root rot Thielaviopsis basicola Cissus discolor Houseplant Gray mold Botrytis cinerea Hylocereus undatus Night-blooming cereus Phoma leaf spot Phoma sp. Saintpaulia ionantha African violet Root and crown rot Pythium sp.,
Rhizoctonia sp. Small Fruits & Berries - Fungal Diseases Latin Name Common Name Disease Pathogen Fragaria sp. Strawberries
(Totem & Chuksan) Red stele Phytophthora fragariae var.
fragariae Fragaria sp. ' Benton' Strawberries (Benton) Black root rot;
Botrytis gray mold Complex of fungi;
Botrytis cinerea Fragaria sp., Rubus sp. Strawberries &
Raspberries Red stele,
Spur blight Phytophthora fragariae var.
fragariae, Didymella applanata Ribes rubrum Red currant Botrytis dieback & fruit rot Botrytis sp. Rubus sp. Marionberry Leaf & cane spot Septoria rubi Raspberry Spur blight Phoma sp. Raspberry Botrytis gray mold Botrytis sp. Raspberries Phytophthora root rot Phytophthora sp. Logan Blackberry Cane blight,
Anthracnose Leptosphaeria coniothyrium,
Elsinoe veneta Red raspberry Phytophthora root rot Phytophthora sp. Page 5 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Blackberry (Marionberry) Purple blotch or leaf & cane spot Septocyta ruborum or
Septoria rubi Rubus sp. ' Tulameen &
Qualicum' Raspberry (Tulameen &
Qualicum) Botrytis cane blight,
Spur blight Botrytis cinerea,
Didymella applanata Rubus sp. 'Williamette' Red raspberry
(Williamette) Phytophthora root rot Phytophthora sp. Vaccinium corymbosum Blueberry (Bluecrop) Botrytis blight,
Alternaria fruit rot Botrytis cinerea,
Alternaria sp. Vaccinium corymbosum
'Blue Jay' Blueberry (Blue Jay) Twig blight,
Tip blight Phomopsis vacinii,
Botrytis sp. Vaccinium corymbosum
'Elliot' Blueberry (Elliot) Gray mold Botrytis cinerea Vaccinium corymbosum
'Jersey' Highbush Blueberry
(Jersey) Gray mold Botrytis cinerea Latin Name Common Name Disease Pathogen Malus domestica Apple tree European canker Nectria galligena Apple (G11) Diaporthe canker Diaporthe tanakae Apple tree Apple scab Venturia inaequalis Apple tree Apple scab Venturia inaequalis Apple seedling
(M-9-337 rotstock) Phomopsis canker,
Rhizoctonia root rot Phomopsis sp.,
Rhizoctonia sp. Malus domestica 'Bergundy' Bergundy Apple Anthracnose Cryptosporiopsis curvispora Malus domestica 'Buckley
Giant' Buckley Giant apple tree Nectria twig blight Nectria cinnabarina Malus domestica 'Elstar' Apple tree (Elstar) Nectria twig blight;
anthracnose Nectria cinnabarina,
Cryptosporiopsis curvispora Malus domestica 'Jonagold' Apple tree (Jonagold?) Nectria canker,
Apple scab Nectria galligena,
Venturia inaequalis Malus domestica 'Molly's
Delicious' Apple seedling (Molly's
Delicious) Phomopsis canker Phomopsis sp. Malus domestica ,
Pyrus sp. Apple & pear twigs Nectria canker,
Anthracnose Nectria galligena,
Cryptosporiopsis curvispora Malus domestica 'Snowdrift' Apple tree (Snowdrift) Apple scab Venturia inaequalis Malus sp. 'Winter Gem' Crabapple (Winter Gem) Wood-rotting fungus Basidiomycete Prunus domestica,
Malus domestica Italian prune, Apple European canker Nectria galligena Prunus persica Frost peach tree Brown rot Monilinia sp. Peach tree Peach leaf curl Taphrina deformans Prunus sp. Cherry tree Cherry leaf spot Blumeriella jaapii Apricot tree Brown rot Monilinia sp. Prunus spp. Peach & cherry trees Replant disease Unknown Pyrus communis 'Comice' &
'Bartlett' Comice & Bartlett pear
trees Phomopsis canker Phomopsis sp. Pryus pyrifolia Asian Pear Rust Gymnosporangium sp. Asian pear trees Phytophthora root rot,
Canker Phytophthora sp.,
Cytospora sp. Tree Fruits - Bacterial Diseases Tree Fruits - Fungal Diseases Page 6 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Latin Name Common Name Disease Pathogen Juglans regia English walnut Walnut blight Xanthomonas arboricola pv.
juglandis Juglans sp. Walnut fruit Walnut blight Xanthomonas arboricola pv.
juglandis Prunus persica
'Indian red blood' Peach tree (Indian
red blood) Bacterial canker Pseudomonas syringae pv.
s<i>yringae Pyrus communis 'Comice' &
'Bartlett' Comice & Bartlett pear
trees Pseudomonas dieback Pseudomonas syringae pv.
s<i>yringae Pyrus pyrifolia Asian pear Blossom blast Pseudomonas syringae pv.
syringae Asian pear Bacterial blight Pseudomonas syringae pv.
syringae Latin Name Common Name Disease Pathogen Prunus sp. Cherry tree Prune dwarf virus PDV Latin Name Common Name Disease Pathogen Gramineae Home lawn Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Home lawn Brown blight,
Net blotch Dreschslera siccans,
D. dictyoides Leaf spot Drechslera sp. Municipal golf course Necrotic ring spot Leptosphaeria korrae Home lawn Yellow patch Rhizoctonia cerealis Yellow patch Rhizoctonia cerealis Yellow patch Rhizoctonia cerealis Yellow patch Rhizoctonia cerealis Home lawn Typhula blight (gray snow
mold) Typhula sp. Typhula blight Typhula sp. Typhula blight Typhula sp. Home lawn Brown patch,
Fusarium patch,
Septoria leaf spot Rhizoctonia solani,
Michrodochium nivale,
Septoria sp. Home lawn Fairy ring Basidiomycete Home lawn Brown patch Rhizoctonia solani Home lawn Fusarium patch,
Anthracnose,
Pythium crown & root rot Michrodochium nivale,
Colletotrichum graminicola,
Pythium sp. Trees Fruit - Viral Diseases Turfgrass - Fungal Diseases Page 7 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Home lawn Red thread,
Anthracnose Laetisaria fuciformis,
Colletotrichum graminicola Home lawn Curvularia blight,
Leaf spot,
Brown patch Curvularia sp.,
Dreschslera sp.,
Rhizoctonia solani School lawn Red thread Laetisaria fuciformis Home lawn Curvularia blight Curvularia sp. Curvularia blight Curvularia sp. Curvularia blight Curvularia sp. Curvularia blight Curvularia sp. Curvularia blight Curvularia sp. Home lawn Necrotic ring spot,
Yellow patch Leptosphaeria korrae,
Rhizoctonia cerealis Home lawn Curvularia blight,
Necrotic ring spot Curvularia sp.,
Leptosphaeria korrae Home lawn Anthracnose Colletotrichum graminicola Home lawn Curvularia blight, Pythium
blight, Fusarium patch,
Yellow patch Curvularia sp.,
Pythium sp.,
Michrodochium nivale,
Rhizoctonia cerealis Home lawn Red thread,
Curvularia blight,
Spermospora leaf blight Laetisaria fuciformis,
Curvularia sp.,
Spermospora sp. Three school fields Red thread,
Yellow patch,
Pythium root/crown rot Laetisaria fuciformis,
Rhizoctonia cerealis,
Pythium sp. Home lawn Curvularia blight,
Fairy ring Curvularia sp.,
Basidiomycete Home lawn Pythium crown rot,
Necrotic ring spot Pythium sp.,
Leptosphaeria korrae Home lawn Typhula blight,
Anthracnose,
Leaf spot Typhula sp.,
Colletotrichum graminicola ,
Drechslera sp. Home lawn Necrotic ring spot,
Pythium crown/root rot Leptosphaeria korrae,
Pythium sp. Home lawn Yellow patch,
Pythium rot/crown rot Rhizoctonia cerealis,
Pythium sp. Home lawn Anthracnose basal rot,
Drechslera leaf spot Colletotrichum graminicola,
Drechslera sp. Home lawn Curvularia blight,
Necrotic ring spot Curvularia sp.,
Leptosphaeria korrae Home lawn Pythium crown/root rot Pythium sp. Turf research plots Fusarium patch Michrodochium nivale Turf Slime mold Myxomycete Golf course putting green Anthracnose, Red thread Colletotrichum graminicola,
Laetisaria fuciformis Vegetables & Herbs - Fungal Diseases Latin Name Common Name Disease Pathogen Allium sp. 'Walla Walla' &
A. ampeloprasum Onion (Walla Walla) &
Garlic (elephant) Botrytis leaf blight,
Purple blotch Botrytis squamosa,
Alternaria porri Page 8 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Brassica pekinensis Chinese cabbage Downy mildew,
Gray leaf spo/Black speck Peronospora parasitica,
Alternaria brassicae Brassica sp. Various Brassicas Powdery mildew Erysiphe sp. Cucumis sativus Burpless cucumber Damping-off Pythium sp., Fusarium sp. Cucumber seedlings Cercospora leaf spot Cercospora sp. Cucumber Possibly black rot rot Phomopsis sclerotioides Glycine max 'Edamame' Edamame seed Various seed-rotting fungi Alternaria sp.,
Aspergillus sp.,
Penicillium sp.,
Rhizopus sp. Lactuca sativa Lettuce (head) Lettuce drop,
Downy mildew Sclerotinia minor,
Bremia lactucae Lycopersicon esculentum Tomato Early blight Alternaria solani Panax quinquefolius Ginseng Botrytis blight,
Disappearing root rot Botrytis sp.,
Cylindrocarpon sp. Rheum rhabarbarum Rhubarb Gray mold Botrytis sp. Rhubarb Gray mold Botrytis cinerae Teucrium sp., Thymus sp. Germander & Thyme Black root rot Thielaviopsis basicola Thymus serpyllum Green lemon thyme Gray mold Botrytis sp. Zea mays Sweet corn Yeast infection of inner husk
leaves Basidiomycetous yeast
(Pseudozyma)? Vegetables & Herbs - Bacterial Diseases Latin Name Common Name Disease Pathogen Coriandrum sativum Coriander (Cilantro) Possible Pseudomonas blight Pseudomonas sp. Cucurbita spp. Pumpkin & squash Angular leaf spot Pseudomonas syringae pv.
lachrymans Lactuca sativa
'Sharpshooter' Lettuce (Sharpshooter) Varnish spot Pseudomonas cichorii Lycopersicon esculentum Tomato (Best Boy or Early
Girl) Pith necrosis Pseudomonas corrugata Rheum rhabarbarum Rhubarb Possible red leaf?? Erwinia rhapontici?? Rhubarb Possible red leaf?? Erwinia rhapontici?? Solanum tuberosum Potato Potato scab Streptomyces scabies Vegetables & Herbs - Viral Diseases Latin Name Common Name Disease Pathogen Capsicum sp. Peppers Cucumber mosiac virus CMV Lycopersicon esculentum
'Beef Steak', 'Early Girl' Tomatoes (Beef Steak,
Early Girl) Possible viral disease Possibly CMV or ToMV Groundcovers - Fungal Diseases Latin Name Common Name Disease Pathogen Arctostaphylos uva-ursi Kinnikinnick Leaf spot Cryptostictis sp. Kinnikinnick Leaf spot Cryptostictis sp. Kinnikinnick Leaf spot Cryptostictis sp. Kinnikinnick Leaf spot Phyllosticta sp. Kinnikinnick Leaf spot Phyllosticta amicta Kinnikinnick Phyllosticta leaf spot,
Root rot Phyllosticta sp.,
Rhizoctonia sp. Kinnikinnick Leaf gall Exobasidium vaccinii Page 9 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Kinnikinnick Black root rot,
Pythium root rot Thielaviopsis basicola,
Pythium sp. Page 10
The web site itself may have changed. You can check the current page or check for previous versions at the Internet Archive. Yahoo! is not affiliated with the authors of this page or responsible for its content. WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Shrubs & Vines - Fungal Diseases WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Shrubs & Vines - Fungal Diseases Latin Name Common Name Disease Pathogen Daphne buckwoodii Daphne Black root rot Thielaviopsis basicola Buxus sempervirens Boxwood Phytophthora root rot Phytophthora sp. Boxwood (Winter Gem?) Phytophthora root rot Phytophthora sp. Ceanothus sp. Wild lilac Phyllosticta leaf spot Phyllosticta sp. Choisya ternata Mexican orange Root rot Phytophthora sp.,
Rhizoctonia sp. Clerodendrum trichotomum Harlequin glorybower Gray mold Botrytis sp. Corylus cornuta Western hazelnut Phytophthora root rot Phytophthora sp. Cotoneaster sp. Cotoneaster Botrytis blight Botrytis sp. Euonymus sp. Euonymus Armillaria root rot Armillaria sp. Gaultheria shallon Salal Leaf spot Phyllosticta sp. Salal Leaf spot Phyllosticta sp. Salal Leaf spots Mycosphaerella sp.,
Phyllosticta sp. Salal seedlings (plugs) Botrytis blight,
Phytophthora root rot Botrytis sp.,
Phytophthora sp. Salal Gray mold,
Stem canker Botrytis sp.,
Fusicoccum sp.,
Coniothyrium sp. Hedera helix English ivy Anthracnose,
Phyllosticta leaf spot Colletotrichum sp.,
Phyllosticta sp. Iberis sp. Candytuft Botrytis blight Botrytis sp. Ilex verticillata Holly Phomopsis canker Phomopsis sp. Lonicera sp. Honeysuckle Phoma leaf spot Phoma sp. Photinia sp. Photinia Leaf spot Entomosporium mespili Pyracantha sp. Firethorn Scab Spilocaea pyracanthae Rhododendron sp. Rhododendron Bud blight Briosia azaleae Rhododendron Powdery mildew Microsphaera sp. Rhododendron Botrytis shoot blight Botrytis cinerea Rhododendron Gray blight Pestalotiopsis sp. Rhododendron Armillaria root rot Armillaria sp. Rhododendron
(Ann Rose Whitney) Phytophthora root rot Phytophthora sp. Rhododendron sp.,
Acer sp. Various bonzai - azalea,
maple Pythium root rot Pythium sp. Rosa sp. Rose Botrytis bud/twig blight Botrytis sp. Rose Black spot,
Gray mold Marssonina rosae,
Botrytis cinerea Rose Bud blight,
Canker Botrytis sp.,
Diaporthe sp. Syringa sp. Lilac (Katherine
Havemeyer) Pythium damping off Pythium sp. Viburnum sp. Viburnum Fungal leaf spot Cercospora sp. Viburnum Cercospora leaf spot Cercospora sp. Shrubs & Vines - Bacterial Diseases Latin Name Common Name Disease Pathogen Photinia sp. Photinia Pseudomonas blight Pseudomonas syringae Rosa sp. Rose Hairy root Agrobacterium rhizogenes Page 1 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Rose (Brigadoon) Hairy root Agrobacterium rhizogenes Viburnum sp. Viburnum Bacterial blight Pseudomonas syringae pv.
v<i>iburni Shrubs & Vines - Viral Diseases Latin Name Common Name Disease Pathogen Rosa sp. Rose (Westerland) Possible rose mosaic? Rose mosaic complex Broadleaf Trees - Fungal Diseases Latin Name Common Name Disease Pathogen Acer circinatum Vine maple Verticillium wilt Verticillium sp. Acer macrophyllum Bigleaf maple Verticillium wilt Verticillium sp. Acer palmatum Laceleaf maple Verticillium wilt Verticillium sp. Japanese maple Verticillium wilt Verticillium sp. Japanese maple Verticillium wilt Verticillium sp. Japanese maple Nectria canker Nectria galligena Acer palmatum 'Ornatum' Japanese red laceleaf
maple Verticillium wilt Verticillium dahliae Acer sp. Coral maple Verticillium wilt Verticillium sp. Maple Verticillium wilt Verticillium sp. Vine maple Nectria canker Nectria sp. Arbutus menziesii Madrone Phytophthora root rot Phytophthora sp. Cercis canadensis Redbud Verticillium wilt Verticillium sp. Cornus Kousa Dogwood (Kousa) Powdery mildew Phyllactinia sp. Cornus nuttalli Dogwood Phytophthora root rot Phytophthora sp. Cornus nuttalli x C. Kousa Dogwood Powdery mildew Phyllactinia sp. Cornus sp. Dogwood Anthracnose Discula destructiva Cornus stolonifera Red-osier dogwood Anthracnose Discula destructiva Red-osier dogwood Septoria leaf spot Septoria sp. Crataegus sp. Native hawthorn Scab,
Phyllosticta leaf spot Venturia inaequalis,
Phyllosticia sp. Elaeagnus angustifolia Russian olive Verticillium wilt Verticillium sp. Nandina domestica Heavenly bamboo Phyllosticta leaf spot Phyllosticta sp. Oemleria cerasiformis Indian plum Leaf spot Cylindrosporium sp.,
Diaporthe sp. Populus tremuloides Quaking aspen Poplar leaf and shoot blight Venturia macularis Prunus serrulata
'Shirofugen' Japanese flowering cherry
'Shirofugen' Coryneum blight Wilsonomyces carpophilus Prunus sp. Flowering plum Brown rot Monilinia sp. Pyrus calleryana Ornamental pear White rot,
Phomopsis canker Botrysphaeria dothidae,
Phomopsis sp. Pyrus sp. Ornamental pear hybrid European canker,
Nectria twig blight Nectria galligena,
Nectria cinnabarina Quercus suber Cork oak (bonsai) Leaf spot Cylindrocarpon sp. Salix sp. Willow Leaf spot Cladosporium sp.,
Trichothecium sp. Salix matsudana 'Tortuosa' Willow (corkscrew) Black canker Collectrichum gloeosporioides Salix matsudana x alba Willow (Austee) Scab Venturia saliciperda Stewartia pseudocamellia Stewartia Leaf spot Coniothyrium sp.,
Phoma sp. Page 2 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Syringa sp. Lilac Gray mold,
Phyllosticta leaf spot Botrytis sp.,
Phyllosticta sp. Syringa vulgaris
(field samples) Lilac seedlings
(field samples) Damping-off/Root rot Phytophthora sp.,
Pythium sp.,
Thielaviopsis sp. Syringa vulgaris
(greenhouse samples) Lilac seedlings
(greenhouse samples) Damping-off/Root rot Phytophthora sp.,
Pythium sp.,
Thielaviopsis basicola Ulmus americanum American elm Dutch elm disease Ophiostoma ulmi American elm Dutch elm disease Ophiostoma ulmi Ulmus sp. Elm Dutch elm disease Ophiostoma ulmi Conifers - Fungal Diseases Latin Name Common Name Disease Pathogen Abies concolor White fir Fir rust,
Gray mold Uredinopsis pteridis,
Botrytis sp. Abies fraseri Fraser fir Phytophthora root rot Phytophthora sp. Fraser fir Fomes heart rot Heterobasidion annosum Fraser fir seedlings Phytophthora root rot Phytophthora sp. Abies grandis Grand fir Interior needle blight,
Rhizosphaera needle cast Unknown cause;
Rhizosphaera kalkhoffii Abies grandis & Abies
magnifica 'Shastensis' Grand fir & Shasta fir Grovesiella canker Grovesiella sp. Abies procera Noble fir Fomes heart rot Heterobasidion annosum Noble firs Possibly stringy butt rot
(yellow root rot) Perenniporia subacida Noble firs Stringy butt rot Perenniporia subacida Noble firs Stringy butt rot Perenniporia subacida Noble fir Phytophthora root rot Phytophthora sp. Noble fir Fomes heart rot Heterobasidion annosum Noble fir seedlings Phytophthora root rot Phytophthora sp. Abies procera & Abies
grandis Noble fir & Grand fir Phomopsis canker Phomopsis sp. Abies sp. Fir Armillaria root rot Armillaria sp. Araucaria araucana Monkey-puzzle tree Phyllosticta leaf spot Phyllosticta sp. Cedrus sp. Various bonzai - azalea,
maple, cedar Pythium root rot Pythium sp. Cedrus atlantica Blue atlas cedar Gray mold (tip blight) Botrytis sp. Atlas cedar Botrytis tip blight/gray mold Botrytis cinerea Blue atlas cedar Tip blight Botrytis sp.,
Pestalotiopsis sp. Cedrus deodara Deodar cedar Armillaria root rot Armillaria sp. Deodar cedar Gray mold Botrytis cinerea Juniperus horizontalis Juniper Tip blight Sclerophoma sp. Juniperus sabina
'Tamariscifolia' Juniper (Tam) Phomopsis twig blight Phomopsis juniperovora Juniperus sp. Juniper (Hollywood) Kabatina tip blight Kabatina thujae Juniper (Blue carpet) Phytophthora root rot Phytophthora sp. Larix decidua 'Pendula' European weeping larch Botrytis tip blight Botrytis sp. Pinus contorta Shore pine Lophodermella needle cast Lophodermella sp. Lodgepole pine Needle cast Lophodermium sp. Page 3 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Pinus densiflora &
P. strobus Japanese red pine &
white pine Needle cast Lophodermium sp. or
Lophodermella sp. Pinus flexis
' Vanderwolf' Vanderwolf pine Lophodermium needle cast Lophodermium nitens Pinus ponderosa Ponderosa pine Lophodermium needle cast Lophodermium seditiosum Pinus sp. Pine trees Lophodermium needle cast Lophodermium sp. Pinus sp., Abies sp. Pine, fir Armillaria root rot Armillaria sp. Pinus thunbergiana Japanese black pine Lophodermium needle cast Lophodermium sp. Pseudotsuga menziesii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir (Hollywood) Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Yellow-green mottle
syndrome, Swiss needle cast Unknown;
Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Swiss needle cast Phaeocryptopus gaeumannii Douglas fir Laminated root rot Phellinus weirii Douglas fir Laminated root rot Phellinus weirii Douglas fir Laminated root rot Phellinus weirii Douglas fir Armillaria root rot Armillaria sp. Douglas fir Melampsora needle rust Melampsora occidentalis Thuja sp. Arborvitae Armillaria root rot Armillaria sp. Thuja heterophylla Western hemlock
seedlings Gray mold Botrytis sp. Thuja occidentalis
'Pyramidalis' Arborvitae (Emerald
Green 'Pyramidalis') Phytophthora root rot Phytophthora sp. Thuja plicata Cedar tree Armillaria root rot Armillaria sp. Western red cedar Armillaria root rot Armillaria sp. Thuja sp. Arborvitae Black canker Colletotrichum gloeosporiodies Tsuga heterophylla Western hemlock Phytophthora root rot Phytophthora sp. Western hemlock Armillaria root rot Armillaria sp. Flowers & Bulbs - Fungal Diseases Latin Name Common Name Disease Pathogen Ajuga sp. Ajuga Powdery mildew Erysiphe sp. Bacopa sp. Bacopa Gray mold Botrytis sp. Dahlia sp. Dahlia Gray mold Botrytis sp. Delphinium sp. Larkspur Gray mold,
Root rot Botrytis sp.,
Pythium sp. Larkspur Powdery mildew Erysiphe sp. Fuchsia sp. Fuchsia Gray mold/Botrytis blight Botrytis cinerea Helleborus orientalis Lenten rose Anthracnose,
Black leaf spot Colletotrichum sp.,
Coniothyrium sp. Hemerocallis spp. Daylily Anthracnose Colletotrichum sp. Iris versicolor &
Iris foetidissima Iris Rust Puccinia iridis Narcissus sp. Mini-daffodil bulbs Smoulder;
White mold Botrytis narcissicola,
Ramularia vallisumbrosae Paeonia sp. Peony Botrytis blight Botrytis sp. Page 4 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Pelargonium sp. Geranium cedar
basket/potting mix Slime mold,
Saprophytic Basidiomycete Myxomycete,
Basidiomycete Petunia hybrida Petunia Powdery mildew Oidium sp. Phlox maculata (Natacha) Phlox 'Natacha' Downy mildew Peronospora sp. Vinca minor Dwarf periwinkle Black root rot,
Stem canker Thielaviopsis basicola,
Phomopsis sp. Flowers & Bulbs - Bacterial Diseases Latin Name Common Name Disease Pathogen Delphinium sp. Larkspur Black leaf spot Pseudomonas delphinii Iris foetidissima Rhizomatous iris Bacterial soft rot Erwina carotovora subsp.
c<i>arotovora Lilium sp. Lily bulbs Bacterial fasciation Rhodococussus fascians Pelargonium hortorum &
P. peltatum Geraniums (ivy & zonal) Bacterial leaf spot/blight Xanthomonas hortorum pv.
pelargonii Pelargonium spp. Various geraniums Bacterial blight of geranium Xanthomonas hortorum pv.
pelargonii Geraniums Bacterial blight Xanthomonas hortorum pv.
pelargonii Flowers & Bulbs - Nematode Diseases Latin Name Common Name Disease Pathogen Bergenia sp. Bergenia Foliar nematodes Aphelenchoides sp. House Plants - Fungal Diseases Latin Name Common Name Disease Pathogen Begonia rex-cultorum Rex begonia Powdery mildew of begonia Microsphaera begoniae Fuchsia hybrida Fuchsia (Dusty Rose) Black root rot Thielaviopsis basicola Cissus discolor Houseplant Gray mold Botrytis cinerea Hylocereus undatus Night-blooming cereus Phoma leaf spot Phoma sp. Saintpaulia ionantha African violet Root and crown rot Pythium sp.,
Rhizoctonia sp. Small Fruits & Berries - Fungal Diseases Latin Name Common Name Disease Pathogen Fragaria sp. Strawberries
(Totem & Chuksan) Red stele Phytophthora fragariae var.
fragariae Fragaria sp. ' Benton' Strawberries (Benton) Black root rot;
Botrytis gray mold Complex of fungi;
Botrytis cinerea Fragaria sp., Rubus sp. Strawberries &
Raspberries Red stele,
Spur blight Phytophthora fragariae var.
fragariae, Didymella applanata Ribes rubrum Red currant Botrytis dieback & fruit rot Botrytis sp. Rubus sp. Marionberry Leaf & cane spot Septoria rubi Raspberry Spur blight Phoma sp. Raspberry Botrytis gray mold Botrytis sp. Raspberries Phytophthora root rot Phytophthora sp. Logan Blackberry Cane blight,
Anthracnose Leptosphaeria coniothyrium,
Elsinoe veneta Red raspberry Phytophthora root rot Phytophthora sp. Page 5 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Blackberry (Marionberry) Purple blotch or leaf & cane spot Septocyta ruborum or
Septoria rubi Rubus sp. ' Tulameen &
Qualicum' Raspberry (Tulameen &
Qualicum) Botrytis cane blight,
Spur blight Botrytis cinerea,
Didymella applanata Rubus sp. 'Williamette' Red raspberry
(Williamette) Phytophthora root rot Phytophthora sp. Vaccinium corymbosum Blueberry (Bluecrop) Botrytis blight,
Alternaria fruit rot Botrytis cinerea,
Alternaria sp. Vaccinium corymbosum
'Blue Jay' Blueberry (Blue Jay) Twig blight,
Tip blight Phomopsis vacinii,
Botrytis sp. Vaccinium corymbosum
'Elliot' Blueberry (Elliot) Gray mold Botrytis cinerea Vaccinium corymbosum
'Jersey' Highbush Blueberry
(Jersey) Gray mold Botrytis cinerea Latin Name Common Name Disease Pathogen Malus domestica Apple tree European canker Nectria galligena Apple (G11) Diaporthe canker Diaporthe tanakae Apple tree Apple scab Venturia inaequalis Apple tree Apple scab Venturia inaequalis Apple seedling
(M-9-337 rotstock) Phomopsis canker,
Rhizoctonia root rot Phomopsis sp.,
Rhizoctonia sp. Malus domestica 'Bergundy' Bergundy Apple Anthracnose Cryptosporiopsis curvispora Malus domestica 'Buckley
Giant' Buckley Giant apple tree Nectria twig blight Nectria cinnabarina Malus domestica 'Elstar' Apple tree (Elstar) Nectria twig blight;
anthracnose Nectria cinnabarina,
Cryptosporiopsis curvispora Malus domestica 'Jonagold' Apple tree (Jonagold?) Nectria canker,
Apple scab Nectria galligena,
Venturia inaequalis Malus domestica 'Molly's
Delicious' Apple seedling (Molly's
Delicious) Phomopsis canker Phomopsis sp. Malus domestica ,
Pyrus sp. Apple & pear twigs Nectria canker,
Anthracnose Nectria galligena,
Cryptosporiopsis curvispora Malus domestica 'Snowdrift' Apple tree (Snowdrift) Apple scab Venturia inaequalis Malus sp. 'Winter Gem' Crabapple (Winter Gem) Wood-rotting fungus Basidiomycete Prunus domestica,
Malus domestica Italian prune, Apple European canker Nectria galligena Prunus persica Frost peach tree Brown rot Monilinia sp. Peach tree Peach leaf curl Taphrina deformans Prunus sp. Cherry tree Cherry leaf spot Blumeriella jaapii Apricot tree Brown rot Monilinia sp. Prunus spp. Peach & cherry trees Replant disease Unknown Pyrus communis 'Comice' &
'Bartlett' Comice & Bartlett pear
trees Phomopsis canker Phomopsis sp. Pryus pyrifolia Asian Pear Rust Gymnosporangium sp. Asian pear trees Phytophthora root rot,
Canker Phytophthora sp.,
Cytospora sp. Tree Fruits - Bacterial Diseases Tree Fruits - Fungal Diseases Page 6 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Latin Name Common Name Disease Pathogen Juglans regia English walnut Walnut blight Xanthomonas arboricola pv.
juglandis Juglans sp. Walnut fruit Walnut blight Xanthomonas arboricola pv.
juglandis Prunus persica
'Indian red blood' Peach tree (Indian
red blood) Bacterial canker Pseudomonas syringae pv.
s<i>yringae Pyrus communis 'Comice' &
'Bartlett' Comice & Bartlett pear
trees Pseudomonas dieback Pseudomonas syringae pv.
s<i>yringae Pyrus pyrifolia Asian pear Blossom blast Pseudomonas syringae pv.
syringae Asian pear Bacterial blight Pseudomonas syringae pv.
syringae Latin Name Common Name Disease Pathogen Prunus sp. Cherry tree Prune dwarf virus PDV Latin Name Common Name Disease Pathogen Gramineae Home lawn Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Necrotic ring spot Leptosphaeria korrae Home lawn Brown blight,
Net blotch Dreschslera siccans,
D. dictyoides Leaf spot Drechslera sp. Municipal golf course Necrotic ring spot Leptosphaeria korrae Home lawn Yellow patch Rhizoctonia cerealis Yellow patch Rhizoctonia cerealis Yellow patch Rhizoctonia cerealis Yellow patch Rhizoctonia cerealis Home lawn Typhula blight (gray snow
mold) Typhula sp. Typhula blight Typhula sp. Typhula blight Typhula sp. Home lawn Brown patch,
Fusarium patch,
Septoria leaf spot Rhizoctonia solani,
Michrodochium nivale,
Septoria sp. Home lawn Fairy ring Basidiomycete Home lawn Brown patch Rhizoctonia solani Home lawn Fusarium patch,
Anthracnose,
Pythium crown & root rot Michrodochium nivale,
Colletotrichum graminicola,
Pythium sp. Trees Fruit - Viral Diseases Turfgrass - Fungal Diseases Page 7 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Home lawn Red thread,
Anthracnose Laetisaria fuciformis,
Colletotrichum graminicola Home lawn Curvularia blight,
Leaf spot,
Brown patch Curvularia sp.,
Dreschslera sp.,
Rhizoctonia solani School lawn Red thread Laetisaria fuciformis Home lawn Curvularia blight Curvularia sp. Curvularia blight Curvularia sp. Curvularia blight Curvularia sp. Curvularia blight Curvularia sp. Curvularia blight Curvularia sp. Home lawn Necrotic ring spot,
Yellow patch Leptosphaeria korrae,
Rhizoctonia cerealis Home lawn Curvularia blight,
Necrotic ring spot Curvularia sp.,
Leptosphaeria korrae Home lawn Anthracnose Colletotrichum graminicola Home lawn Curvularia blight, Pythium
blight, Fusarium patch,
Yellow patch Curvularia sp.,
Pythium sp.,
Michrodochium nivale,
Rhizoctonia cerealis Home lawn Red thread,
Curvularia blight,
Spermospora leaf blight Laetisaria fuciformis,
Curvularia sp.,
Spermospora sp. Three school fields Red thread,
Yellow patch,
Pythium root/crown rot Laetisaria fuciformis,
Rhizoctonia cerealis,
Pythium sp. Home lawn Curvularia blight,
Fairy ring Curvularia sp.,
Basidiomycete Home lawn Pythium crown rot,
Necrotic ring spot Pythium sp.,
Leptosphaeria korrae Home lawn Typhula blight,
Anthracnose,
Leaf spot Typhula sp.,
Colletotrichum graminicola ,
Drechslera sp. Home lawn Necrotic ring spot,
Pythium crown/root rot Leptosphaeria korrae,
Pythium sp. Home lawn Yellow patch,
Pythium rot/crown rot Rhizoctonia cerealis,
Pythium sp. Home lawn Anthracnose basal rot,
Drechslera leaf spot Colletotrichum graminicola,
Drechslera sp. Home lawn Curvularia blight,
Necrotic ring spot Curvularia sp.,
Leptosphaeria korrae Home lawn Pythium crown/root rot Pythium sp. Turf research plots Fusarium patch Michrodochium nivale Turf Slime mold Myxomycete Golf course putting green Anthracnose, Red thread Colletotrichum graminicola,
Laetisaria fuciformis Vegetables & Herbs - Fungal Diseases Latin Name Common Name Disease Pathogen Allium sp. 'Walla Walla' &
A. ampeloprasum Onion (Walla Walla) &
Garlic (elephant) Botrytis leaf blight,
Purple blotch Botrytis squamosa,
Alternaria porri Page 8 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Brassica pekinensis Chinese cabbage Downy mildew,
Gray leaf spo/Black speck Peronospora parasitica,
Alternaria brassicae Brassica sp. Various Brassicas Powdery mildew Erysiphe sp. Cucumis sativus Burpless cucumber Damping-off Pythium sp., Fusarium sp. Cucumber seedlings Cercospora leaf spot Cercospora sp. Cucumber Possibly black rot rot Phomopsis sclerotioides Glycine max 'Edamame' Edamame seed Various seed-rotting fungi Alternaria sp.,
Aspergillus sp.,
Penicillium sp.,
Rhizopus sp. Lactuca sativa Lettuce (head) Lettuce drop,
Downy mildew Sclerotinia minor,
Bremia lactucae Lycopersicon esculentum Tomato Early blight Alternaria solani Panax quinquefolius Ginseng Botrytis blight,
Disappearing root rot Botrytis sp.,
Cylindrocarpon sp. Rheum rhabarbarum Rhubarb Gray mold Botrytis sp. Rhubarb Gray mold Botrytis cinerae Teucrium sp., Thymus sp. Germander & Thyme Black root rot Thielaviopsis basicola Thymus serpyllum Green lemon thyme Gray mold Botrytis sp. Zea mays Sweet corn Yeast infection of inner husk
leaves Basidiomycetous yeast
(Pseudozyma)? Vegetables & Herbs - Bacterial Diseases Latin Name Common Name Disease Pathogen Coriandrum sativum Coriander (Cilantro) Possible Pseudomonas blight Pseudomonas sp. Cucurbita spp. Pumpkin & squash Angular leaf spot Pseudomonas syringae pv.
lachrymans Lactuca sativa
'Sharpshooter' Lettuce (Sharpshooter) Varnish spot Pseudomonas cichorii Lycopersicon esculentum Tomato (Best Boy or Early
Girl) Pith necrosis Pseudomonas corrugata Rheum rhabarbarum Rhubarb Possible red leaf?? Erwinia rhapontici?? Rhubarb Possible red leaf?? Erwinia rhapontici?? Solanum tuberosum Potato Potato scab Streptomyces scabies Vegetables & Herbs - Viral Diseases Latin Name Common Name Disease Pathogen Capsicum sp. Peppers Cucumber mosiac virus CMV Lycopersicon esculentum
'Beef Steak', 'Early Girl' Tomatoes (Beef Steak,
Early Girl) Possible viral disease Possibly CMV or ToMV Groundcovers - Fungal Diseases Latin Name Common Name Disease Pathogen Arctostaphylos uva-ursi Kinnikinnick Leaf spot Cryptostictis sp. Kinnikinnick Leaf spot Cryptostictis sp. Kinnikinnick Leaf spot Cryptostictis sp. Kinnikinnick Leaf spot Phyllosticta sp. Kinnikinnick Leaf spot Phyllosticta amicta Kinnikinnick Phyllosticta leaf spot,
Root rot Phyllosticta sp.,
Rhizoctonia sp. Kinnikinnick Leaf gall Exobasidium vaccinii Page 9 WSU-Puyallup Plant Clinic 1999 Host- Pathogen Index Kinnikinnick Black root rot,
Pythium root rot Thielaviopsis basicola,
Pythium sp. Page 10
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