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Diseases of Impatiens
(Impatiens wallerana) and New Guinea Impatiens (Impatiens hybrids)

Margery Daughtrey, collator (last update 5/25/00)

BACTERIAL DISEASES

Bacterial fasciation

Rhodococcus fascians (Tilford 1936) Goodfellow 1984, comb. nov.

Pseudomonas leaf spot

Pseudomonas syringae van Hall 1902

FUNGAL DISEASES

Botrytis blight

Botrytis cinerea Pers.:Fr.

Downy mildew

Plasmopara obducens (J. Schröt) J. Schröt in Cohn

Fusarium root and crown rot

Fusarium sp.

Myrothecium leaf spot

Myrothecium roridum Tode:Fr.

Phyllosticta leaf spot

Phyllosticta sp.

Phytophthora root rot

Phytophthora sp.

Powdery mildew

Oidium sp.

Pythium root rot

Pythium aphanidermatum (Edson) Fitzp.

P. debaryanum (Auct. Non R. Hesse)

P. irregulare Buisman

P. paroecandrum Drechs.

P. spinosum Sawada

P. ultimum Trow

Rhizoctonia root and stem rot

Rhizoctonia solani Kühn

Southern blight

Sclerotium rolfsii Sacc.

Verticillium wilt

Verticillium albo-atrum Reinke & Berthier

NEMATODES, PARASITIC

Root-knot nematode

Meloidogyne arenaria (Neal) Chitwood

VIRAL AND VIROID DISEASES

Cucumber mosaic

genus Cucumovirus, Cucumber mosaic virus (CMV)

Helenium S

genus Carlavirus, Helenium S virus (HVS)

Impatiens necrotic spot

genus Tospovirus, Impatiens necrotic spot virus (INSV)

Potexvirus, unnamed

genus Potexvirus

Tobacco streak

genus Ilarvirus, Tobacco streak virus (TSV)

Tomato spotted wilt

genus Tospovirus, Tomato spotted wilt virus (INSV)