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Photo Gallery of Vegetable Problems – Cabbage


General Cabbage Disease and Pest Management

Diseases

Alternaria black spot

Black Leg

Botrytis stem blight

Clubroot

Downy Mildew

Ring Spot

Insect/Mite Pests

Diamondback moth Imported cabbage worm Western flower thrips

(Click on photo to enlarge)

 

General Cabbage Disease and Pest Management

Cabbage Diseases: Ecology and Control, by Anthony P. Keinath, Marc A. Cubeta, and David B. Langston, Jr.

Cabbage/Kale, Brassicas. infonet-biovision. Photos of various disease and pest problems on brassica crops.

Crop Profile for Cabbage Seed in Washington, by Lindsey J. du Toit, Washington State University Mount Vernon NWREC.

Crucifer Disease Guide – A Practical Guide for Seedsmen, Growers and Agricultural Advisors. Published by Seminis Vegetable Seeds, Inc.’s Plant Health Department and Seed Health Departments.

 

Diseases

DiseaseAlternaria black spot
PathogensAlternaria brassicae and Alternaria brassicicola

Photo Source: Lindsey du Toit Photo Source: Dick Gabrielson Photo Source: Lindsey du Toit
Photo Source: Lindsey du Toit

On-Line Resources:

Pacific Northwest Plant Disease Management Handbook: Cabbage and Cauliflower (Brassica) – Black Spot {Leaf, Stem, or Pod Spots}

Pacific Northwest Plant Disease Management Handbook: Seed Crop, Crucifers – Black Spot {Leaf, Stem or Pod Spots}

Alternaria Diseases of Crucifers. Plant Pathology Fact Sheet PP–34, Florida Cooperative Extension Service/Institute of Food and Agricultural Science/University of Florida.

UC Pest Management Guidelines: Cole Crops: Alternaria Leafspot. UC IPM Online, University of California.

Crucifer Diseases: Alternaria Leaf Spot. AVRDC International Cooperators’ Fact Sheet.

Disease Management: Alternaria Diseases of BrassicasThe Plant Diagnostic Clinic, UMassAmherst.


DiseaseBlack Leg
PathogensPhoma lingam (sexual stage = Leptosphaeria maculans)
Host crops: Most members of the Brassicaceae (Cruciferae) = cabbage family, including broccoli, Brussels sprouts, cabbage, canola, cauliflower, various Chinese brassica vegetables, collard, kale, mizuna, mustard, oilseed rape, oilseed turnip rape, rutabaga, turnip, etc.),Sinapis (white and yellow mustard), and Raphanus (daikon and radish). Several wild species exist that may be infected by P. lingam including Descurainia (tansymustard), Sisymbrium(hedge mustard), and Thlaspi (penny-cress). This is a quarantine disease in five counties in northwestern WA because of the risk of this pathogen to the brassica vegetable seed industry.

Photo Source: Lindsey du Toit, Washington State University.
Photo Source: Cynthia Ocamb, Oregon State University. Photo Source: Lindsey du Toit, Washington State University.

On-Line Resources:

Video: Blackleg Disease and Resistance Management. Published by the Canola Council of Canada.

Pacific Northwest Plant Disease Management Handbook: Cabbage and Cauliflower (Brassicasp.)-Black Leg and Phoma Root Rot

Pacific Northwest Plant Disease Management Handbook: Seed Crop, Crucifers-Blackleg

Black leg in Brassicaceae crops and wild crucifers: 2014 outbreak in the Willamette Valley of Oregon

Black Leg, Light Leaf Spot, and White Leaf Spot, Cynthia Ocamb, PhD., Plant Pathologist, OSU Extension, Associate Professor–Botany & Plant Pathology.

Fungicides for Control of Black Leg, David Priebe, Pesticides Program, Oregon Department of Agriculture.

Addressing Blackleg in the Willamette Valley: Oregon Department of Agriculture permanent ruling released on black leg of brassicaceae in January 2015 – see the Brassica Production Districts document, and the OSDA Permanent Ruling document titled ‘Crucifer blackleg disease requirements moved into one regulation; removes same requirements from rapeseed production districts,’ below.

Management of Black Leg in Oregon on Brassica seed crops, a Clinic Close-up, Oregon State University Extension Service.

Management of Black Leg in Oregon on Vegetable Brassica Crops and Seed Crops, a Clinic Close-up, Oregon State University Extension Service.


DiseaseBotrytis stem blight
Pathogen: Botrytis cinerea

On-Line Resources:


DiseaseClubroot
PathogenPlasmodiophora brassicae
Host cropsBroccoli, cabbage, cauliflowerbrassicaceae (cruciferous) weeds, and radish.

Photo Source: Lindsey du Toit

On-Line Resources:

Pacific Northwest Plant Disease Management Handbook: Cabbage and Cauliflower (Brassica) – Clubroot

Clubroot of Crucifers. Vegetable MD Online.

Clubroot. Wikipedia.

Clubroot of vegetable brassicas – towards integrated control. New Zealand Institute for Crop & Food Research Ltd.

Clubroot of Crucifers. The Ohio State University Extension.

Managing Clubroot: Equipment Sanitation Guide. Canola Council of Canada

Top 10 tips from the 2013 International Clubroot Workshop. Canola Watch, Canola Council of Canada.

See Diseases, pests, and other problems common to many vegetables: Clubroot of brassica vegetables.


DiseaseDowny mildew
PathogensHyaloperonospora parasitica = Peronospora parasitica
Host crops: Most members of the Brassicaceae (Cruciferae) = cabbage family, including cabbage and cauliflower.

Photo Source: Lindsey du Toit

On-Line Resources:

Pacific Northwest Plant Disease Management Handbook: Cabbage and Cauliflower (Brassicasp.) – Downy Mildew {Staghead}

Downy Mildew of Crucifers. Plant Pathology Fact Sheet. Florida Cooperative Extension Service.

Brassica Downy Mildew. University of Massachusetts Amherst.

See Brassicaceae: Downy Mildew.


DiseaseRing spot
Pathogen: Mycosphaerella brassicicola

Photo Source: D.A. Inglis

On-Line Resources:

Pacific Northwest Plant Disease Management Handbook: Cabbage and Cauliflower (Brassica) – Ring spot (Black Blight)


Insect/Mite Pests

Common nameDiamondback moth
Latin binomialPlutella xylostella

Photo Source: Photographer – Johnny Stark. Submitted by Jenny Glass

On-Line Resources:

Caterpillar Pests of the Cabbage Family. Washington State University Fact Sheet FS018E.

Pacific Northwest Insect Management Handbook. Chapter: Vegetables, Section: Boccoli, Cabbage, other Crucifers.


Common nameImported cabbage worm
Latin binomialPieris rapae

Photo Source: Photographer – Johnny Stark
Submitted by Jenny Glass

On-Line Resources:

Caterpillar Pests of the Cabbage Family. Washington State University Fact Sheet FS018E.

Pacific Northwest Insect Management Handbook. Chapter: Vegetables, Section: Boccoli, Cabbage, other Crucifers.


Common nameWestern flower thrips
Latin binomialFrankliniella occidentalis.
Host cropsBasilBroccoli, Cabbage, CauliflowerCucumberOnionPotatoPumpkinSquash,Tomato and Watermelon.

Photo Source: Michael Bush, WSU Extension, Yakima, WA

On-Line Resources:

Pacific Northwest Insect Management Handbook. Chapter: Vegetables, Section: Broccoli, Cabbage, other Crucifers.

Vegetables: Broccoli, Cole crops: Thrips, Washington State University Hortsense.

Western Flower Thrips Thysanoptera: Thripidae Frankiniella occidentalis,

See Diseases, pests, and other problems common to many vegetables: Western flower thrips.