This is a list of diseases of carrots (Daucus carota subsp. sativus).
Bacterial diseases
Bacterial diseasesBacterial leaf blight Xanthomonas campestrisBacterial soft rotErwinia chrysanthemi E. carotovora subsp. carotovora = Pectobacterium carotovorum subsp. carotovorum E. carotovora subsp. atroseptica = Pectobacterium carotovorum subsp. atrosepticumCarrot bacterial gallRhizobacter dauciCarrot bacteriosis Xanthomonas campestris pv. carotae Crown gall Agrobacterium tumefaciensHairy root Agrobacterium rhizogenesScab Streptomyces scabiei
Fungal diseases
Fungal diseasesAlternaria leaf blight Alternaria dauciBlack root rot Thielaviopsis basicola Chalara elegans [synanamorph] Black rot (black carrot root dieback) Alternaria radicina Stemphylium radicinumBlue mold rot (blue green mold) Penicillium expansumBrown rot (Phoma disease) Leptosphaeria libanotis Phoma rostrupii [anamorph] Buckshot rot Typhula spp. Canker Thanatephorus cucumeris Rhizoctonia solani [anamorph] Cavity spot Pythium spp. Pythium violae Rhizoctonia spp. Rhizoctonia solaniCercospora leaf spot Cercospora carotaeCottony rot Sclerotinia minor Sclerotinia sclerotiorumCrater rot Athelia arachnoidea (anamorph = Fibulorhizoctonia carotae)Crown rot Rhizoctonia spp. Rhizoctonia solaniDamping off Fusarium spp. Pythium spp. Rhizoctonia solaniDieback of carrots Pythium spp. Pythium debaryanumDowny mildew Plasmopara crustosa Plasmopara niveaForking, brown root Pythium spp. Pythium irregulare Pythium paroecandrum Pythium sylvaticumFusarium dry rot Fusarium sp. Gray mold rot Botryotinia fuckeliana Botrytis cinerea [anamorph] Hard rot Fusarium sp. Gliocladium roseumLateral root dieback Pythium spp. Leaf rot Typhula variabilisLeaf spot Ramularia spp. Licorice rot Mycocentrospora acerina Centrospora acerina Sclerotinia sclerotiorum Thielaviopsis basicola Typhula spp. Phytophthora root rot Phytophthora megaspermaPink mold rot Trichothecium roseumPowdery mildew Erysiphe heraclei Erysiphe polygoni Erysiphe umbelliferarum f. dauciPythium brown rot and forking Pythium irregulare Pythium paroecandrum Pythium sulcatum Pythium sylvaticumPythium root dieback Pythium spp. Rhizoctonia canker Rhizoctonia solaniRhizoctonia seedling disease Rhizoctonia spp. Rhizopus wooly soft rot Rhizopus arrhizus Rhizopus oryzae Rhizopus stolonifer Rhizopus nigricansRoot canker Rhizoctonia spp. Root dieback Pythium spp. Root rot Fusarium spp. Fusarium culmorum Rhizoctonia spp. Sclerotium rolfsiiPhymatotrichum root rot (cotton root rot) Phymatotrichopsis omnivora Phymatotrichum omnivorumRubbery brown rot Phytophthora cactorum P. megaspermaRubbery slate rot Pythium debaryanumRust Aecidium foeniculi Uromyces graminis Uromyces lineolatus subsp. nearcticus Uromyces scirpiRusty root Pythium spp. Olpidium brassicae, as vector, tobacco necrosis virus Sclerotinia rot Sclerotinia sclerotiorum Sclerotinia minorSeed mold Alternaria alternata Gibberella fujikuroi Fusarium moniliforme [anamorph] Sooty rot Aspergillus nigerSour rot Geotrichum candidumSouthern blight Athelia rolfsii Sclerotium rolfsii [anamorph] Stem spot Diaporthe arctiiTip rot Numerous pathogens Umbel blight Colletotrichum gloeosporioidesViolet root rot Helicobasidium brebissonii Helicobasidium purpureum Rhizoctonia crocorum [anamorph] Watery soft rot Sclerotinia minor Sclerotinia sclerotiorum Sclerotium rolfsii Botrytis cinerea
Nematodes, parasitic
Nematodes, parasiticCyst nematode Heterodera carotae Dagger nematode XiphinemaLance nematode Hoplolaimus uniformis Lesion nematode Pratylenchus penetrans Pratylenchus spp. Root knot Meloidogyne hapla Sting nematode Belonolaimus longicaudatus Stubby-root nematodes Trichodorus
Virus and viroid diseases
diseasesAlfalfa mosaic genus Alfamovirus, Alfalfa mosaic virus (AMV)Carrot latent genus Nucleorhabdovirus, Carrot latent virus (CtLtV) Carrot mottle genus Umbravirus, Carrot mottle virus (CMoV) Carrot red leaf genus Luteovirus, Carrot red leaf virus (CaRLV) Carrot thin leaf genus Potyvirus, Carrot thin leaf virus (CTLV) Carrot yellow leaf Carrot yellow leaf virus (CYLV) Celery mosaic genus Potyvirus, Celery mosaic virus (CeMV) Cucumber mosaic genus Cucumovirus, Cucumber mosaic virus (CMV) Curly top genus Hybrigeminivirus, Beet curly top virus (BCTV) Motley dwarf genus Luteovirus, Carrot red leaf virus (CaRLV) genus Umbravirus, Carrot mottle virus (CMoV)
Phytoplasmal and spiroplasmal diseases
Phytoplasmal and spiroplasmal diseasesAster yellows Aster yellows phytoplasma
Miscellaneous diseases and disorders
Miscellaneous diseases and disordersCrown rot disorder No specific pathogen associated with this disorder Heat canker High soil surface temperature Hollow black heart Boron deficiency Ozone injury Ozone pollution Root scab Physiological Speckled carrot No pathogen; genetic disorder
References
Common Names of Diseases, The American Phytopathological Society Carrot Diseases (Fact Sheets and Information Bulletins), The Cornell Plant Pathology Vegetable Disease Web Page