The following is a list of diseases in citrus plants.
Bacterial diseases Bacterial diseasesBacterial spot Xanthomonas euvesicatoria pv. citrumeloBlack pit (fruit) Pseudomonas syringaeBlast Pseudomonas syringaeCitrus canker Xanthomonas citri pv. citriCitrus variegated chlorosis Xylella fastidiosaHuanglongbing = citrus greening Candidatus Liberibacter asiaticus Candidatus L. africanus
Fungal diseases Fungal diseasesAlbinism Alternaria alternata Alternaria tenuis Aspergillus flavusAlternaria brown spot Alternaria alternataAlternaria leaf spot of rough lemon Alternaria citriAlternaria stem-end rot Alternaria citriAnthracnose = wither-tip Glomerella cingulata Colletotrichum gloeosporioides [anamorph] Areolate leaf spot Thanatephorus cucumeris Pellicularia filamentosa Rhizoctonia solani [anamorph] Black mold rot Aspergillus nigerBlack root rot Thielaviopsis basicola Chalara elegans [synanamorph] Black rot Alternaria citriBlack spot Guignardia citricarpa Phyllosticta citricarpa [synanamorph] Blue mold Penicillium italicumBotrytis blossom and twig blight, gummosis Botrytis cinerea Botryotinia fuckeliana [teleomorph] Branch knot Sphaeropsis tumefaciensBrown rot (fruit) Phytophthora citricola Phytophthora citrophthora Phytophthora hibernalis Phytophthora nicotianae var. parasitica Phytophthora parasitica Phytophthora palmivora Phytophthora syringaeCharcoal root rot Macrophomina phaseolinaCitrus black spotGuignardia citricarpaDamping-off Pythium sp. Pythium aphanidermatum Pythium debaryanum Pythium rostratum Pythium ultimum Pythium vexans Rhizoctonia solaniDiplodia gummosis and stem-end rot Lasiodiplodia theobromae Botryodiplodia theobromae Diplodia natalensis Botryosphaeria rhodina [teleomorph] Dothiorella gummosis and rot Botryosphaeria ribis Dothiorella gregaria [anamorph] Dry root rot complex Nectria haematococca Fusarium solani [anamorph] together with other wound-invading agents Dry rot (fruit) Ashbya gossypii Nematospora coryliFly speck Schizothyrium pomi Zygophiala jamaicensis [anamorph] Fusarium rot (fruit) Fusarium spp. Fusarium wilt Fusarium oxysporum f.sp. citriGray mold (fruit) Botrytis cinereaGreasy spot and greasy spot rind blotch Mycosphaerella citri Stenella citri-grisea [anamorph] Green mold Penicillium digitatumHeart rot Ganoderma applanatum Ganoderma brownii Ganoderma lucidum and other basidiomycetes Hendersonula branch wiltHendersonula toruloideaLeaf spot Mycosphaerella horii Mycosphaerella lageniformisMal secco Phoma tracheiphila Deuterophoma tracheiphilaMancha foliar de los citricos Alternaria limicolaMelanose Diaporthe citri Phomopsis citri [anamorph] Mucor fruit rot Mucor paronychia Mucor racemosusMushroom root rot = shoestring root rot or oak root fungus Armillaria mellea Clitocybe tabescens Rhizomorpha subcorticalis [anamorph] Phaeoramularia leaf and fruit spot Phaeoramularia angolensisPhymatotrichum root rot Phymatotrichopsis omnivoraPhomopsis citri Diaporthe citri [teleomorph] Phytophthora foot rot, gummosis and Phytophthora citrophthora Phytophthora hibernalis Phytophthora nicotianae var. parasitica Phytophthora parasitica Phytophthora palmivora Phytophthora syringaePink disease Erythricium salmonicolor Corticium salmonicolor Necator decretus [anamorph] Pink mold Gliocladium roseumPleospora rot Pleospora herbarum Stemphylium herbarum [anamorph] Poria root rot Oxyporus latemarginatus Poria latemarginataPost bloom fruit drop Colletotrichum acutatumPowdery mildew Oidium tingitaninum Acrosporium tingitaninumRhizopus rot Rhizopus stoloniferRio Grande gummosis Possibly Lasiodiplodia theobromae Hendersonula toruloidea and other unknown agents Rootlet rot Pythium rostratum Pythium ultimumRosellinia root rot Rosellinia sp. Scab Elsinoë fawcettii Sphaceloma fawcettii [anamorph] Sclerotinia twig blight, fruit rot and root rot Sclerotinia sclerotiorumSeptoria spot Septoria citriSooty blotch Gloeodes pomigenaSour rot Geotrichum citri-aurantii Galactomyces citri-aurantii [teleomorph] Galactomyces candidum Galactomyces geotrichum [teleomorph] Sweet orange scab Elsinoë australisThread blight Corticium stevensii Pellicularia kolerogaTrichoderma rot Trichoderma viride Hypocrea sp. [teleomorph] Twig blight Rhytidhysteron rufulumUstulina root rot Ustulina deusta Nodulisporium sp. [anamorph] Whisker mold Penicillium ulaienseWhite root rot Rosellinia sp. Rosellinia necatrix Dematophora necatrix [anamorph] Rosellinia subiculata
Nematodes, parasitic Nematodes, parasiticCitrus slump nematode Pratylenchus coffeaeDagger nematode Xiphinema spp. Lesion nematode Pratylenchus spp. Pratylenchus brachyurus Pratylenchus coffeae Pratylenchus vulnusNeedle nematode Longidorus spp. Root-knot nematode Meloidogyne spp. Sheath nematode Hemicycliophora spp. Hemicycliophora arenariaSlow decline (citrus nematode) Tylenchulus semipenetransSpreading decline (burrowing nematode) Radopholus similisSting nematode Belonolaimus longicaudatusStubby-root nematode Paratrichodorus spp. Stunt nematode Tylenchorhynchus spp.
Viral diseases Viral diseasesCitrus mosaic Satsuma dwarf-related virus Bud union crease Virus for some combinations, otherwise genetic or unknown Citrus leaf rugose genus Ilarvirus, Citrus leaf rugose virus (CLRV) Citrus yellow mosaic genus BadnavirusCrinkly leaf Crinkly leaf virus (strain of Citrus variegation virus) Infectious variegation genus Ilarvirus, Citrus variegation virus (CVV) Navel infectious mottling Satsuma dwarf-related virus Psorosis Citrus psorosis virus (CPsV)Satsuma dwarf Satsuma dwarf virus (SDV) Tatter leaf = citrange stunt genus Capillovirus, Citrus tatter leaf virus (probably a closely related strain of Apple stem grooving virus rather than a distinct virus )Tristeza = decline and stem pitting, seedling yellows genus Closterovirus, Citrus tristeza virus (CTV) Citrus Leprosis Virus type I & II
Viroids and graft-transmissible pathogens [GTP] Viroids and graft-transmissible pathogens [GTP]Algerian navel orange virus GTP Blight = young tree decline, rough lemon decline GTP Blind pocket GTP Cachexia Citrus cachexia viroid (Hostuviroid) Chlorotic dwarf White-fly transmitted GTP Citrus dwarfing Various viroids Citrus vein enation (CVEV) = woody gall GTP (possible luteovirus) Citrus yellow mottle GTP Citrus yellow ringspot GTP Concave gum GTP Cristacortis GTP Exocortis Citrus exocortis viroid (CEVd) Pospiviroidae Fatal yellows GTP Gummy bark GTP, possible viroid Gum pocket and gummy pittings GTP, possible viroid Impietratura GTP Indian citrus ringspot GTP Leaf curl GTP Leathery leaf GTP Leprosis GTP associated with Brevipalpus spp. mites Measles GTP Milam stem-pitting GTP Multiple sprouting disease GTP Nagami kumquat disease GTP Ringspot diseases Various GTPs Xyloporosis = cachexia Citrus cachexia viroid (Hostuviroid) Yellow vein GTP Yellow vein clearing of lemon GTP
Phytoplasmal and spiroplasmal diseases Phytoplasmal and spiroplasmal diseasesAustralian citrus dieback Unknown procaryote? Stubborn Spiroplasma citri (spread by leafhoppers) Witches’ broom of lime Phytoplasma
Miscellaneous diseases and disorders Miscellaneous diseases and disordersAlgal disease (algal spot) Cephaleuros virescensAmachamiento Unknown Blossom-end clearing Physiological Chilling injury Cold temperatures Citrus blightUnknown — pathogen suspectedCreasing Nutritional (?) Crinkle scurf Genetic Granulation Physiological Lemon sieve-tube necrosis Unknown, but hereditary Lime blotch = wood pocket Inherited chimeral agent Membranous stain Cold temperatures Mesophyll collapse Unknown Oleocellosis Physiological Postharvest pitting Physiological Puffing Physiological Rind breakdown Physiological Rind staining Physiological Rind stipple of grapefruit Environmental Rumple of lemon fruit Unknown Shell bark complex Unknown — (viroid?) Sooty mold (superficial, not pathogenic) Capnodium C. citricola Capnodium sp. Stem-end rind breakdown Physiological Stylar-end breakdown of Tahiti lime Physiological Stylar-end rind breakdown Physiological Stylar-end rot Physiological Sunburn Excessive heat and light Tangerine dieback Unknown Water spot Physiological Woody galls on stemsBruchophagus fellis (Citrus Gall Wasp)Zebra skin Physiological
References
Common Names of Diseases, The American Phytopathological Society