This article is a list of diseases of geraniums (Pelargonium).
Bacterial diseases
Bacterial diseasesBacterial blight Xanthomonas campestris pv. pelargoniiBacterial fasciation Rhodococcus fascians = Corynebacterium fasciansBacterial leaf spot Acidovorax sp. Pseudomonas cichorii Pseudomonas syringaeCrown gall Agrobacterium tumefaciensSouthern wilt Ralstonia solanacearum
Fungal diseases
Fungal diseasesArmillaria root rot Armillaria melleaBlack root rot Thielaviopsis basicolaBlackleg Cutting rotPythium sp. Botryosphaeria stem rot Botryosphaeria ribisBotrytis blight Botrytis cinereaCottony stem rot Sclerotinia sclerotiorumDamping-off Pythium sp. Rhizoctonia sp. Downy mildew Peronospora conglomerataFusarium cutting rot Fusarium sp. Glomerella stem rot Glomerella cingulata Leaf mold Aspergillus fischerianus Diaporthe rudis Diaporthe medusaea Botryosporium pulchrumLeaf spot Alternaria alternata Alternaria tenuis Cercospora brunkii Bipolaris setariae Cochliobolus setariae [teleomorph] Bipolaris maydis Cochliobolus heterostrophus [teleomorph] Ascochyta spp. Discohainesia oenotherae Pleosphaerulina spp. Colletotrichum gloeosporioides Glomerella cingulata [teleomorph] Phyllosticta spp. Cylindrocladium scoparium Calonectria kyotensis [teleomorph]Phytophthora root rot Phytophthora spp. Powdery mildew Erysiphe geraniacearum Neoerysiphe geranii Podosphaera fugaxPythium root rot Pythium spp. Rhizoctonia root and crown rot Rhizoctonia solani Thanatephorus cucumeris [teleomorph]Rust Puccinia pelargonii-zonalisVerticillium wilt Verticillium albo-atrum Verticillium dahliae
Virus diseases
Virus diseasesLeaf cupping and curling Beet curly top virus Mosaic Arabis mosaic virus Cucumber mosaic virus Tobacco mosaic virus Impatiens necrotic spot virus Tobacco rattle virus Pelargonium flower break Pelargonium flower break virus Pelargonium line pattern Pelargonium line pattern virus Pelargonium ring pattern Pelargonium ring pattern virus Pelargonium ringspot Tomato ringspot virus Tobacco ringspot virus Pelargonium zonale spot Pelargonium zonate spot virus Vein clearing Pelargonium vein clearing virus
Nematodes, parasitic
Nematodes, parasiticFoliar nematode Aphelenchoides coffeae Aphelenchoides fragariaeNematodes Pratylenchus pratensis Tylenchorhynchus dubius Xiphinema americanumRoot knot Meloidogyne arenaria Meloidogyne hapla Meloidogyne incognita
Miscellaneous diseases and disorders
Miscellaneous diseases and disordersEdema (Oedema) Moisture imbalance in plants when soil is warm and wet while the air is cool and wet Leaf bleaching Heat stress Yellow net vein
References Common Names of Diseases, The American Phytopathological Society