This article is a list of diseases of alfalfa (Medicago sativa).
Bacterial diseases
Bacterial diseasesBacterial leaf spot Xanthomonas campestris pv. alfalfaeBacterial sprout rot Erwinia chrysanthemi pv. chrysanthemiBacterial stem blightPseudomonas savastanoi pv. phaseolicola = P. medicaginisBacterial wilt Clavibacter michiganensis subsp. insidiosus = Corynebacterium insidiosumCrown gall Agrobacterium tumefaciensCrown and root rot complex Pseudomonas viridiflavaDwarf Xylella fastidiosa
Fungal diseases
Fungal diseasesAcrocalymma root and crown rot Acrocalymma medicaginis Massarina walkeri [teleomorph] Anthracnose Colletotrichum trifoliiAphanomyces root rot Aphanomyces euteichesBlack patch Rhizoctonia leguminicolaBlack root rot Thielaviopsis basicola Chalara elegans [synanamorph] Blossom blight Botrytis cinerea Botryotinia fuckeliana [teleomorph] Sclerotinia sclerotiorumBrown root rot Phoma sclerotioides Plenodomus melilotiCrown and root rot complex Fusarium acuminatum Gibberella acuminata [teleomorph] Fusarium avenaceum Gibberella avenacea [teleomorph] Fusarium equiseti Fusarium oxysporum Fusarium sambucinum Fusarium solani Nectria haematococca [teleomorph] Fusarium spp. Phoma medicaginis Pythium spp. Rhizoctonia solani Thanatephorus cucumeris [teleomorph] Thielaviopsis basicola Chalara elegans [synanamorph] Charcoal rot Macrophomina phaseolinaCommon leaf spot Pseudopeziza medicaginisCorky root rot Xylaria sp. Crown wart Physoderma alfalfae Urophlyctis alfalfaeCylindrocarpon root rot Cylindrocarpon magnusianum Cylindrocarpon ehrenbergii Nectria ramulariae [teleomorph] Cylindrocladium root and crown rot Cylindrocladium crotalariae Calonectria crotalariae [teleomorph] Damping-off Fusarium acuminatum Gibberella acuminata [teleomorph] Mycoleptodiscus terrestris Phytophthora medicaginis Phytophthora megasperma f.sp. medicaginis Pythium spp. Pythium debaryanum Pythium irregulare Pythium splendens Pythium ultimum Rhizoctonia solani Thanatephorus cucumeris [teleomorph] Downy mildew Peronospora trifoliorumFusarium wilt Fusarium oxysporum f.sp. medicaginisLepto leaf spot Leptosphaerulina trifoliiMarasmius root rot Marasmius sp. Mycoleptodiscus crown and root rot Mycoleptodiscus terrestrisMyrothecium root rot Myrothecium roridum Myrothecium verrucariaPhymatotrichum root rot = cotton root rot = Texas root rot Phymatotrichopsis omnivora Phymatotrichum omnivorumPhytophthora root rot Phytophthora medicaginis Phytophthora megasperma f.sp. medicaginisPowdery mildew Erysiphe medicaginis Leveillula papilionacearumRhizoctonia root rot and stem blight Rhizoctonia solani Thanatephorus cucumeris [teleomorph] Rhizopus sprout rot Rhizopus stoloniferRust Uromyces striatus Uromyces medicaginis Uromyces oblongus Uromyces striatus var. medicaginisSclerotinia crown and stem rot Sclerotinia trifoliorum Sclerotinia sclerotiorumSouthern blight Sclerotium rolfsii Athelia rolfsii [teleomorph] Spring black stem and leaf spot Phoma medicaginisStagonospora leaf spot and root rot Stagonospora meliloti Phoma meliloti [synanamorph] Leptosphaeria pratensis [teleomorph] Stemphylium leaf spot Pleospora spp. Stemphylium alfalfae Pleospora alfalfae[teleomorph] Stemphylium botryosum Pleospora tarda [teleomorph] Stemphylium globuliferum Stemphylium herbarum Pleospora herbarum [teleomorph] Stemphylium vesicarium species complex Summer black stem and leaf spot Cercospora medicaginis Verticillium wilt Verticillium albo-atrum Verticillium dahliaeViolet root rot Helicobasidium brebissonii Rhizoctonia crocorum[anamorph] Winter crown rot = Coprinus snow moldCoprinus psychromorbidusYellow leaf blotch Leptotrochila medicaginis Pyrenopeziza medicaginis Pseudopeziza jonesii Sporonema phacidioides [anamorph]
Nematodes, parasitic
Nematodes, parasiticBulb and stem nematode Ditylenchus dipsaciChrysanthemum foliar nematode Aphelenchoides ritzemabosiCyst nematode Heterodera trifoliiDagger nematode Xiphinema americanumLesion nematode Pratylenchus spp. Pratylenchus neglectus Pratylenchus penetransNeedle nematode Longidorus spp. Pin nematode Paratylenchus spp. Paratylenchus hamatusReniform nematode Rotylenchulus spp. Root-knot nematode Meloidogyne spp. Meloidogyne arenaria Meloidogyne chitwoodi Meloidogyne hapla Meloidogyne incognita Meloidogyne javanicaSpiral nematode Helicotylenchus spp. Stubby-root nematode Paratrichodorus spp. Stunt nematode Tylenchorhynchus spp.
Viral diseases
Viral diseasesAlfalfa enation genus Rhabdovirus, Alfalfa enation virus (AEV) Alfalfa mosaic genus Alfamovirus, Alfalfa mosaic virus (AMV) Bean leaf roll genus Luteovirus, Bean leaf roll virus (BLRV) Bean yellow mosaic genus Potyvirus, Bean yellow mosaic virus (BYMV) Cucumber mosaic genus Cucumovirus, Cucumber mosaic virus (CMV) Lucerne Australian latent genus Nepovirus, Lucerne Australian latent virus (LALV) Lucerne Australian symptomless genus Comoviridae, Lucerne Australian symptomless virus (LASV) Lucerne transient streak genus Sobemovirus, Lucerne transient streak virus (LTSV) Pea streak genus Carlavirus, Pea streak virus (PSV) Red clover vein mosaic genus Carlavirus, Red clover vein mosaic virus (RCVMV) Tobacco streak genus Ilarvirus, Tobacco streak virus (TSV) White clover mosaic genus Potexvirus, White clover mosaic virus (WCMV)
Phytoplasmal and spiroplasmal diseases
Phytoplasmal and spiroplasmal diseasesAster yellows Aster yellows phytoplasma Witches'-broom Phytoplasma
See also Alfalfa pests, pests named for alfalfa
References
Common Names of Diseases, The American Phytopathological Society