- PNW-VEG Home
- Photo Gallery of Vegetable Problems
- Team Newsletters
- Vegetable Events
- Vegetable Resources
- About the Team
Lindsey du Toit
WSU Mount Vernon NWREC
16650 State Route 536
Mount Vernon, WA 98273
USA
Tel. 360•848•6140
Fax 360•848•6159
E-mail: dutoit@wsu.edu
Photo Gallery of Vegetable Problems
(Click on photo to enlarge)
Bean
Oregon State University Plant Clinic’s Monthly HighlightsA source of timely information on plant problems that may occur during the month. A link to the most current issue can be found near the top of the left menu on that website. |
Disease: Halo blight
Pathogen: Pseudomonas syringaepv. phaseolicola
|
On-Line Resources:
An Online Guide To Plant Disease Control: Bean, All (Phaseolus vulgaris) – Halo Blight, Oregon State University Extension
Beet
Disease: Scab
Pathogen: Streptomyces scabies
|
On-Line Resources:
Broccoli
Disease: Downy mildew
Pathogen: Peronospora parasitica
|
On-Line Resources:
An Online Guide To Plant Disease Control: Broccoli (Brassica oleracea) – Downy Mildew (Staghead), Oregon State University Extension
Broccoli, Cole crops: Downy mildew, Washington State University Hortsense
Diseases: Downy mildew, in Cole Crops and Other Brassicas: Organic Production, ATTRA – National Sustainable Agriculture Information Service, pp 12–13
Cabbage
Disease: Botrytis stem blight
Pathogen: Botrytis cinerea
|
On-Line Resources:
Carrot
Disease: Aster yellows
Pathogen: Aster yellows phytoplasma
 |
 |
Photo Source: G.Q. Pelter |
Photo Source: E. J. Sorensen |
On-Line Resources:
An Online Guide To Plant Disease Control: Carrot (Daucus carota) – Aster Yellows, Oregon State University Extension
Disease: Bacterial soft rot
Pathogen: Erwinia species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Carrot (Daucus carota) – Bacterial Soft Rot, Oregon State University Extension
Disease: Black rot
Pathogen: Alternaria radicina
|
On-Line Resources:
An Online Guide To Plant Disease Control: Carrot (Daucus carota) – Black Rot, Oregon State University Extension
Disease: Leaf spot
Pathogen: Cercospora carotae
 |
|
Photo Source: D.A. Inglis |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Carrot (Daucus carota) – Cercospora Leaf Spot and Leaf Blight, Oregon State University Extension
Carrot: Leaf spot, Washington State University
Disease: Powdery mildew
Pathogen: Erysiphe heraclei
|
On-Line Resources:
An Online Guide To Plant Disease Control: Carrot (Daucus carota) – Powdery Mildew, Oregon State University Extension
Disease: Rhizoctonia
Pathogen: Rhizoctonia solani
|
On-Line Resources:
Disease: Root knot
Pathogen: Meloidogyne species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Carrot (Daucus carota) – Nematode (Root-knot), Oregon State University Extension
Carrot: Root-knot nematode, Washington State University Hortsense
Cauliflower
Disease: Cauliflower Mosaic
Pathogen: Cauliflower mosaic virus (CaMV)
 |
 |
 |
Photo Source: L.J. du Toit |
Photo Source: L.J. du Toit |
|
On-Line Resources:
Plant Viruses Online – Cauliflower mosaic caulimovirus, University of Idaho
Disease: Club root
Pathogen: Plasmodiophora bassicae
|
On-Line Resources:
An Online Guide To Plant Disease Control: Cabbage and Cauliflower (Brassica) – Clubroot, Oregon State University Extension
Disease: Ring spot
Pathogen: Mycosphaerella brassicicola
 |
 |
Photo Source: D.A. Inglis |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Cabbage and Cauliflower (Brassica) – Ring spot (Black Blight), Oregon State University Extension
Cruciferous weed
Disease: White rust
Pathogen: Albugo candida
|
On-Line Resources:
Cucumber
Disease: Angular leaf spot
Pathogen: Pseudomonas syringae pv. lachrymans
|
|
|
On-Line Resources:
An Online Guide To Plant Disease Control: Cucumber (Cucumis sativus) – Angular Leaf Spot, Oregon State University Extension
Cucumber, Pumpkin, Squash: Angular leaf spot, Washington State University Hortsense
Disease: Scab
Pathogen: Cladosporium cucumerinum
 |
 |
Photo Source: D.A. Inglis |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Cucumber (Cucumis sativus) – Scab (Gummosis), Oregon State University Extension
Garlic
Disease: Basal rot
Pathogen: Botytis allii and Fusarium roseum
|
On-Line Resources:
An Online Guide To Plant Disease Control: Garlic (Allium sativum) – Basal Rot, Oregon State University Extension ;
Onions, Garlic: Basal rot, Washington State University Hortsense
Green bean
Disease: Fusarium root rot
Pathogen: Fusarium solani
|
On-Line Resources:
An Online Guide To Plant Disease Control: Bean, Snap (Phaseolus vulgaris) – Fusarium Root Rot, Oregon State University Extension
Bean: Fusarium root rot, Washington State University Hortsense
Disease: White mold
Pathogen: Sclerotinia sclerotiorum
|
On-Line Resources:
An Online Guide To Plant Disease Control: Bean, Snap (Phaseolus vulgaris) – White Mold (Sclerotinia Rot), Oregon State University Extension
Bean: White mold (Sclerotinia rot), Washington State University Hortsense
Lettuce
Disease: Anthracnose
Pathogen: Microdochium panattonianum
 |
 |
 |
 |
Photo Source: D.A. Inglis |
Photo Source: D.A. Inglis |
||
On-Line Resources:
An Online Guide To Plant Disease Control: Lettuce (Lactuca sativa) – Anthracnose, Oregon State University Extension
Lettuce: Anthracnose, Washington State University Hortsense
Lima Bean
Disease: Alfalfa mosaic
Pathogen: Alfalfa mosaic virus
|
On-Line Resources:
An Online Guide To Plant Disease Control: Bean Lima (Phaseolus lunatus) – Alfalfa Mosaic, Oregon State University Extension
Onion
Disease: Bacterial soft rot
Pathogen: Bacterial species
|
On-Line Resources:
Disease: Basal rot
Pathogen: Botytis allii and Fusarium roseum
|
On-Line Resources:
Onions, Garlic: Basal rot, Washington State University Hortsense
Disease: Black mold
Pathogen: Aspergillus niger
|
On-Line Resources:
An Online Guide To Plant Disease Control: Onion (Allium cepa) – Black Mold, Oregon State University Extension
Disease: Downy mildew
Pathogen: Peronospora destructor
|
On-Line Resources:
An Online Guide To Plant Disease Control: Onion (Allium cepa) – Downy Mildew, Oregon State University Extension
Onions, Garlic: Downy mildew, Washington State University Hortsense
Disease: Fusarium basal rot
Pathogen: Fusarium species
 |
 |
Photo Source: G.Q. Pelter |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Onion (Allium cepa) – Fusarium Basal Rot, Oregon State University Extension
Disease: Root rot
Pathogen: Trichodorus and Pythium
|
On-Line Resources:
Disease: Smut
Pathogen: Urocystis species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Onion (Allium cepa) – Smut, Oregon State University Extension
Disease: White rot
Pathogen: Sclerotinia cepivorum
|
On-Line Resources:
An Online Guide To Plant Disease Control: Onion (Allium cepa) – White rot, Oregon State University Extension
Onions, Garlic: White rot, Washington State University Hortsense
Pea
Disease: Downy mildew
Pathogen: Peronospora viciae
 |
 |
Photo Source: G.Q. Pelter |
Photo Source: D.A. Inglis |
On-Line Resources:
An Online Guide To Plant Disease Control: Pea (Pisum sativum) – Downy Mildew, Oregon State University Extension
Disease: Pea cyst nematode
Pathogen: Heterodera goettingiana
 |
 |
 |
Photo Source: D.A. Inglis |
Photo Source: D.A. Inglis |
(white cyst stage) |
On-Line Resources:
An Online Guide To Plant Disease Control: Pea (Pisum sativum) – Nematode (Cyst), Oregon State University Extension
Disease: Powdery mildew
Pathogen: Erysiphe pisi
|
On-Line Resources:
An Online Guide To Plant Disease Control: Pea (Pisum sativum) – Powdery Mildew, Oregon State University Extension
Pea: Powdery mildew, Washington State University Hortsense
Pinto bean
Disease: Pythium root rot
Pathogen: Pythium species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Bean, Dry – Pythium Diseases (Pythium Blight), Oregon State University Extension
Potato
Disease: Bacterial soft rot
Pathogen: Erwinia species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Bacterial Soft Rot and Blackleg, Oregon State University Extension
Potato: Bacterial soft rot and blackleg, Washington State University Hortsense
Disease: Black dot
Pathogen: Colletotrichum coccodes
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Black Dot, Oregon State University Extension
Disease: Black scurf
Pathogen: Rhizoctonia solani
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Rhizoctonia Canker (Black Scurf), Oregon State University Extension
Potato: Rhizoctonia canker (Black scurf), Washington State University
Disease: Rhizoctonia stem lesion
Pathogen: Rhizoctonia solani
 |
 |
Photo Source: D.A. Inglis |
Aerial tubers caused by Rhizoctonia stem lesion |
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Rhizoctonia Canker (Black Scurf), Oregon State University Extension
Disease: Early blight lesion on tuber
Pathogen: Alternaria solani
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Early Blight, Oregon State University Extension
Disease: Early dying
Pathogen: Meloidogyne and Verticillium
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Verticillium Wilt (Potato Early Dying), Oregon State University Extension
Potato: Verticillium Wilt (Potato early dying), Washington State University Hortsense
Disease: Fusarium Dry Rot
Pathogen: Fusarium spp.
 |
 |
Photo Source: D. A. Inglis and B. Gundersen |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Fusarium Dry Rot, Oregon State University Extension
Fusarium Dry Rot of Potatoes, Plant Management Network International
Disease: Leaf roll
Pathogen: Potato leaf roll virus
|
|
Photo Source: G.Q. Pelter |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Potato Leafroll Virus (Leaf Roll), Oregon State University Extension
Potato: Potato leafroll mosaic (Leafroll), Washington State University Hortsense
Disease: Powdery scab
Pathogen: Spongospora subterranea
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Powdery Scab, Oregon State University Extension
Potato: Powdery scab, Washington State University Hortsense
Disease: Pythium leak
Pathogen: Pythium species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Leak, Oregon State University Extension
Disease: Pythium
Pathogen: Pythium species
|
On-Line Resources:
Disease: Ring rot
Pathogen: Clavibacter michigansis subsp. sepedonicus
 |
 |
(advanced foliar symptoms) |
(foliar symptoms) |
Photo Source: G.Q. Pelter |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Ring Rot, Oregon State University Extension
Disease: Ring rot and soft rot
Pathogen: Bacterial species
|
On-Line Resources:
Disease: Root knot
Pathogen: Meloidogyne species
 |
 |
Photo Source: G.Q. Pelter |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Nematode (Root-knot), Oregon State University Extension
Disease: Silver scurf
Pathogen: Helminthosporium solani
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Silver Scurf, Oregon State University Extension
Disease: Verticillium wilt
Pathogen: Verticillium dahliae
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Verticillium Wilt (Potato Early Dying), Oregon State University Extension
Potato: Verticillium wilt (Potato early dying), Washington State University Hortsense
Disease: White mold
Pathogen: Sclerotinia sclerotiorum
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – White Mold (Sclerotinia Stem Rot), Oregon State University Extension
Disease:Skin stain symptoms
Pathogen: Fusarium species
|
On-Line Resources:
Disease: Black leg
Pathogen: Erwinia species
 |
 |
 |
Potato 'Norgold' |
Potato 'Ranger Russet' (mid season symptoms) |
Potato 'Norkotah' |
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Bacterial Soft Rot and Blackleg, Oregon State University Extension
Potato: Bacterial soft rot and blackleg, Washington State University Hortsense
Disease: Erwinia
Pathogen: Erwinia
|
On-Line Resources:
Disease: Corky ring spot
Pathogen: Corky ring spot virus
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Corky Ringspot (Potato Stem Mottle), Oregon State University Extension
Disease: Pink rot
Pathogen: Phytophthora erythroseptica
|
On-Line Resources:
An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Corky Ringspot (Potato Stem Mottle), Oregon State University Extension
Pumpkin
Disease: Powdery mildew
Pathogen: Erysiphe chichoracearum
|
On-Line Resources:
Cucumber, Pumpkin, Squash: Powdery Mildew, Washington State University Hortsense
Disease: Suspected zucchini yellows + watermelon
mosaic virus
Pathogen:
|
On-Line Resources:
Disease: Suspected virus
Pathogen: Unknown
|
On-Line Resources:
Disease: Verticillium wilt
Pathogen: Verticillium species
 |
 |
Pumpkin 'We-Be-Little' |
|
On-Line Resources:
Cucumber, Pumpkin, Squash: Verticillium wilt, Washington State University Hortsense
Radish
Disease: White rust
Pathogen: Albugo candida
|
On-Line Resources:
An Online Guide To Plant Disease Control: Radish (Raphanus sativus) – White Rust, Oregon State University Extension
Spinach
Disease: Leaf spot complex
Pathogen: Cladosporium variable and stemphylium species
 |
 |
Photo Source: D.A. Inglis |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Spinach (Spinacia oleracea) – Leaf Spot, Oregon State University Extension
Squash
Disease: Angular leaf spot
Pathogen: Pseudomonas lachrymans
 |
 |
Photo Source: D.A. Inglis |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Squash (Cucurbita spp.) – Angular Leaf Spot, Oregon State University Extension
Cucumber, Pumpkin, Squash: Angular leaf spot, Washinton State University Hortsense
Disease: Curly top
Pathogen: Curly top virus
 |
 |
Squash, butternut |
Squash, winter |
Photo Source: E. J. Sorensen |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Squash (Cucurbita spp.) – Curly Top, Oregon State University Extension
Cucumber, Pumpkin, Squash: Curly top (Beet curly top virus), Washington State University Hortsense
Disease: Powdery mildew
Pathogen: Erysiphe cichoracearum
|
On-Line Resources:
An Online Guide To Plant Disease Control: Squash (Cucurbita spp.) – Powdery Mildew, Oregon State University Extension
Cucumber, Pumpkin, Squash: Powdery mildew, Washington State University Hortsense
Disease: Mosaic
Pathogen: Suspected watermelon mosaic virus
|
On-Line Resources:
An Online Guide To Plant Disease Control: Squash (Cucurbita spp.) – Virus Diseases, Oregon State University Extension
Sweet corn
Disease: Bacterial stalk rot
Pathogen: Erwinia species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Corn (Zea mays) – Bacterial Stalk and Top Rot, Oregon State University Extension
Corn: Root, stalk, and ear rots, Washington State University Hortsense
Swiss chard
Disease: Leaf spot
Pathogen: Ramularia
 |
 |
Photo Source: D.A. Inglis |
|
On-Line Resources:
An Online Guide To Plant Disease Control: Swiss Chard (Beta vulgaris subsp. cicla) – Leaf Spot, Oregon State University Extension
Tomato
Disease: Alternaria
Pathogen: Alternaria solani
 |
 |
 |
 |
Photo Source: D.A. Inglis |
Photo Source: D.A. Inglis |
||
On-Line Resources:
Disease: Buckeye rot
Pathogen: Non pathogenic disorder
|
On-Line Resources:
Disease: Curly top
Pathogen: Curly top virus
|
On-Line Resources:
An Online Guide To Plant Disease Control: Tomato (Lycopersicon esculentum) – Curly Top, Oregon State University Extension
Tomato: Curly top (Beet curly top virus), Washington State University Hortsense
Disease: Late blight
Pathogen: Phytophthora infestans
|
On-Line Resources:
An Online Guide To Plant Disease Control: Tomato (Lycopersicon esculentum) – Late Blight, Oregon State University Extension
Tomato: Late blight, Washington State University Hortsense
Problem: Physiological leaf roll
Cause: Various environmental conditions and management practices
 |
 |
|
Photo Source: PNW VEG members |
||
On-Line Resources:
Physiological Leaf Roll of Tomato, A Fact Sheet prepared by The Pacific Northwest Vegetable Extension Group
Disease: Pythium rot
Pathogen: Pythium species
|
On-Line Resources:
Disease: Verticillium wilt
Pathogen: Verticillium species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Tomato (Lycopersicon esculentum) – Wilts (Fusarium wilt, Verticillium wilt), Oregon State University Extension
Tomato: Verticillium wilt, Washington State University Hortsense
Disease: White rot
Pathogen: Sclerotinia species
|
On-Line Resources:
An Online Guide To Plant Disease Control: Tomato (Lycopersicon esculentum) – White Mold, Oregon State University Extension
Tomato: White mold, Washington State University Hortsense
Our pages provide links to external sites for the convenience of users. WSU Extension does not manage these external sites, nor does Extension review, control, or take responsibility for the content of these sites. These external sites do not implicitly or explicitly represent official positions and policies of WSU Extension.