Photo Gallery of Vegetable Problems

BEAN | BEET | BROCCOLI | CABBAGE | CARROT | CAULIFLOWER | CRUCIFEROUS WEED | CUCUMBER | GARLIC | GREEN BEAN | LETTUCE | LIMA BEAN | ONION | PEA | PINTO BEAN | POTATO | PUMPKIN | RADISH | SPINACH | SQUASH | SWEET CORN | SWISS CHARD | TOMATO
 

Bean

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) Photo Source: D.A. Inglis

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 Photo Source: D.A. Inglis

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: Leaf roll
Pathogen: Potato leaf roll virus

On-Line Resources:

An Online Guide To Plant Disease Control: Potato (Solanum tuberosum) – Potato Leafroll Virus (Leaf Roll), Oregon State University Extension

Potato: Potato leafrool 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' Photo Source: G.Q. Pelter	Potato 'Ranger Russet' (mid season symptoms) Photo Source: G.Q. Pelter	Potato 'Norkotah' Hail damage 3 days post hail storm as comparison Photo Source: G.Q. Pelter

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' Photo Source: D.A. Inglis

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
 

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