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Photo Gallery of Vegetable Problems – Cauliflower


General Disease Management in Cauliflower

Diseases

Black Leg Cauliflower Mosaic Club root
Ring spot

Insect/Mite Pests

Western flower thrips

Abiotic Problems

Boron (B) deficiency

(Click on photo to enlarge)

General Disease Management in Cauliflower

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

Disease: Black Leg
Pathogens:Phoma 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.


DiseaseCauliflower Mosaic
Pathogen: Cauliflower mosaic virus (CaMV)

Photo Source: L.J. du Toit

On-Line Resources:

Plant Viruses Online – Cauliflower mosaic caulimovirus, University of Idaho


DiseaseClub root
Pathogen: Plasmodiophora bassicae
Host cropsBroccolicabbage, cauliflower, brassicaceae (cruciferous) weeds, and radish.

Photo Source: W. A. Anderson

On-Line Resources:

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

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.


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 nameWestern flower thrips
Latin binomialFrankliniella occidentalis.
Host cropsBasilBroccoliCabbage, Cauliflower, CucumberOnionPotatoPumpkinSquash,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.


Abiotic Problems

ProblemBoron (B) deficiency
Crops affected: Most crops can develop symptoms of boron (B) deficiency. Brassica or cole crops have moderate to high B requirements. B deficient cole crops can develop cracked, corky stems, as well as petioles and midribs. Broccoli, cabbage and cauliflower stems may become hollow and discolored. Cauliflower curds may turn brown and leaves roll and curl. Cabbage heads may be smaller than normal and discolored yellow. Cauliflower is the most sensitive of cole crops to B deficiency.

Boron deficiency in broccoli can cause external corkiness and scarring of the main stem, and hollowing of the stem internally.
Photo Source: Gail Ruhl, Purdue University Plant and Pest Diagnostic Lab Photo Source: Lindsey du Toit, Washington State University

Online Resources:

http://agdev.anr.udel.edu/weeklycropupdate/?p=4782

http://customers.hbci.com/~wenonah/min-def/cauliflr.htm

http://www.ipmimages.org/browse/subimages.cfm?sub=18132

http://www.spectrumanalytic.com/support/library/ff/B_Basics.htm

Boron mobility in plants. Chapter 7 from the book Plant and Soil by Patrick H. Brown, Department of Pomology, University of California, Davis and Barry J. Shelp, Department of Horticultural Science, University of Guelph, Guelph, Ontario.

Boron Deficiency Symptoms U.S. Borax Corp.

Boron in vegetables U.S. Borax Corp.