List of lettuce diseases

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This article is a list of diseases of lettuce (Lactuca sativa).

Contents

[edit] Bacterial diseases

Bacterial diseases
Bacterial leaf spot and head rot Xanthomonas campestris pv. vitians
Bacterial soft rot Erwinia carotovora

Pseudomonas marginalis
Corky root Rhizomonas spp.

R. suberifaciens
Varnish spot Pseudomonas cichorii

[edit] Fungal diseases

Fungal diseases
Alternaria leaf spot

Alternaria sonchi
Anthracnose

Microdochium panattonianum
= Marssonina panattoniana
Bottom rot

Rhizoctonia solani
Thanatephorus cucumeris [teleomorph]
Cercospora leaf spot

Cercospora longissima
Damping-off, Pythium

Pythium spp.
Pythium ultimum
Damping-off, Rhizoctonia

Rhizoctonia solani
Downy mildew

Bremia lactucae
Plasmopara lactucae-radicis
Drop (Sclerotinia rot)

Sclerotinia sclerotiorum
Sclerotinia minor
Gray mold

Botrytis cinerea
Botryotinia fuckeliana [teleomorph]
Phymatotrichum root rot (cotton root rot)

Phymatotrichopsis omnivora
= Phymatotrichum omnivorum
Powdery mildew

Erysiphe cichoracearum
Rust

Puccinia dioicae
= Puccinia extensicola var. hieraciata
Septoria leaf spot

Septoria lactucae
Southern blight

Sclerotium rolfsii
Athelia rolfsii [teleomorph]
Stemphylium leaf spot

Stemphylium botryosum
Pleospora tarda [teleomorph]
Wilt and leaf blight

Pythium tracheiphilum

[edit] Miscellaneous diseases and disorders

Miscellaneous diseases and disorders
Brown stain Physiological, excess CO2
Russet spotting Physiological, excess ethylene
Tipburn Physiological, Ca** deficiency and high temperature

[edit] Nematodes, parasitic

Nematodes, parasitic
False root knot

Nacobbus aberrans
Lesion

Pratylenchus spp.
Needle

Longidorus spp.
Root-knot

Meloidogyne spp.
Spiral

Rotylenchus robustus
Stunt

Melinius brevidens
Tylenchorhynchus spp.

[edit] Viral and viroid diseases

(Also mycoplasmalike organism [MLO])

Viral and viroid diseases
Big vein Lettuce big vein virus
Calico Alfalfa mosaic virus

Tobacco ringspot virus
Internal rib necrosis
 Lettuce mosaic virus
Mosaic Lettuce mosaic virus

Biden mosaic virus
Cucumber mosaic virus
Turnip mosaic virus
Necrotic yellows Lettuce necrotic yellows virus
Ring necrosis Presumed viral agent (not identified)
Rusty brown discoloration Accentuated by lettuce mosaic virus
Speckles Lettuce speckles virus and beet western yellows virus
Stunt Beet yellow stunt virus
Virescence Aster yellows MLO

Beet leafhopper-transmitted virescence MLO
Wilt Broadbean wilt virus

Tomato spotted wilt virus
Yellow spot Tobacco rattle virus
Yellows Beet western yellows virus
Other Sowthistle yellow vein virus

[edit] References