List of geranium diseases

This article is a list of diseases of geraniums (Pelargonium).

Bacterial diseases

Bacterial diseases
Bacterial blight Xanthomonas campestris pv. pelargonii
Bacterial fasciation Rhodococcus fascians = Corynebacterium fascians
Bacterial leaf spot Acidovorax sp.

Pseudomonas cichorii
Pseudomonas syringae

Crown gall Agrobacterium tumefaciens
Southern wilt Ralstonia solanacearum

Fungal diseases

Fungal diseases
Armillaria root rot Armillaria mellea
Black root rot Thielaviopsis basicola
Blackleg

Cutting rot

 Pythium sp.
Botryosphaeria stem rot Botryosphaeria ribis
Botrytis blight Botrytis cinerea
Cottony stem rot Sclerotinia sclerotiorum
Damping-off

Pythium sp.
Rhizoctonia sp.

Downy mildew Peronospora conglomerata
Fusarium cutting rot Fusarium sp.
Glomerella stem rot Glomerella cingulata
Leaf mold

Aspergillus fischerianus
Diaporthe rudis
= Diaporthe medusaea
Botryosporium pulchrum

Leaf 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 communis
Pythium root rot Pythium spp.
Rhizoctonia root and crown rot

Rhizoctonia solani
Thanatephorus cucumeris [teleomorph]

Rust Puccinia pelargonii-zonalis
Verticillium wilt

Verticillium albo-atrum
Verticillium dahliae

Virus diseases

Virus diseases
Leaf 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, parasitic
Foliar nematode

Aphelenchoides coffeae
Aphelenchoides fragariae

Nematodes

Pratylenchus pratensis
Tylenchorhynchus dubius
Xiphinema americanum

Root knot

Meloidogyne arenaria
Meloidogyne hapla
Meloidogyne incognita

Miscellaneous diseases and disorders

Miscellaneous diseases and disorders
Edema (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