This article is a list of diseases of alfalfa (Medicago sativa).
Rhizoctonia solani Thanatephorus cucumeris [teleomorph] Thielaviopsis basicola Chalara elegans [synanamorph] = Urophlyctis alfalfae Cylindrocarpon magnusianum = Cylindrocarpon ehrenbergii Nectria ramulariae [teleomorph] Calonectria crotalariae [teleomorph] Fusarium acuminatum Gibberella acuminata [teleomorph] Mycoleptodiscus terrestris Phytophthora medicaginis Phytophthora megasperma f.sp.
Pythium debaryanum Pythium irregulare Pythium splendens Pythium ultimum Rhizoctonia solani Thanatephorus cucumeris [teleomorph] Myrothecium roridum Myrothecium verrucaria Phymatotrichopsis omnivora = Phymatotrichum omnivorum Phytophthora medicaginis Phytophthora megasperma f.sp.
medicaginis Sclerotinia trifoliorum Sclerotinia sclerotiorum Sclerotium rolfsii Athelia rolfsii [teleomorph] Stagonospora meliloti Phoma meliloti [synanamorph] Leptosphaeria pratensis [teleomorph] Pleospora spp.
Stemphylium alfalfae Pleospora alfalfae[teleomorph] Stemphylium botryosum Pleospora tarda [teleomorph] Stemphylium globuliferum Stemphylium herbarum Pleospora herbarum [teleomorph] Stemphylium vesicarium species complex Verticillium albo-atrum Verticillium dahliae Helicobasidium brebissonii Rhizoctonia crocorum[anamorph] Leptotrochila medicaginis = Pyrenopeziza medicaginis = Pseudopeziza jonesii Sporonema phacidioides [anamorph] Ditylenchus dipsaci Aphelenchoides ritzemabosi Heterodera trifolii Xiphinema americanum Pratylenchus spp.