List of lettuce diseases
Encyclopedia
Bacterial diseases
| Bacterial diseases |
|
|---|---|
| Bacterial leaf spot and head rot | Xanthomonas campestris Xanthomonas campestris Xanthomonas campestris is a bacterial species that causes a variety of plant diseases. Available from the NCPPB,and other international Culture collections such as ICMP, ATCC, and LMG in a purified form, it is used in the commercial production of a high-molecular-weight polysaccharide - xanthan... pv. vitians |
| Bacterial soft rot | Erwinia carotovora Pseudomonas marginalis Pseudomonas marginalis Pseudomonas marginalis is a soil bacterium that can cause soft rots of plant tissues. Based on 16S rRNA analysis, P. marginalis has been placed in the P. fluorescens group.... |
| Corky root | Rhizomonas spp. R. suberifaciens |
| Varnish spot | Pseudomonas cichorii Pseudomonas cichorii Pseudomonas cichorii is a Gram-negative soil bacterium that is pathogenic to plants. It has a wide host range, and can have an important economical impact on lettuce, celery and chrysanthemum crops.. P. cichorii was first isolated on endives , from which it derives its name. It produces... |
Fungal diseases
| Fungal diseases |
|
|---|---|
| Alternaria leaf spot | Alternaria sonchi |
| Anthracnose | Microdochium panattonianum Microdochium panattonianum Microdochium panattonianum is a fungal plant pathogen.- External links :* *... Marssonina panattoniana |
| Bottom rot | Rhizoctonia solani Rhizoctonia solani Rhizoctonia solani is a plant pathogenic fungus with a wide host range and worldwide distribution. This plant pathogen was discovered more than 100 years ago. Rhizoctonia solani frequently exists as thread-like growth on plants or in culture. Asexual spores are not produced, only the sexual stage... Thanatephorus cucumeris [teleomorph] |
| Cercospora leaf spot | Cercospora longissima Cercospora longissima Cercospora longissima is a fungal plant pathogen.- External links :**... |
| Damping-off, Pythium | Pythium Pythium Pythium is a genus of parasitic oomycete. Most species are plant parasites, but Pythium insidiosum is an important pathogen of animals... spp. Pythium ultimum Pythium ultimum Pythium ultimum is a plant pathogen.- External links :***... |
| Damping-off, Rhizoctonia | Rhizoctonia solani Rhizoctonia solani Rhizoctonia solani is a plant pathogenic fungus with a wide host range and worldwide distribution. This plant pathogen was discovered more than 100 years ago. Rhizoctonia solani frequently exists as thread-like growth on plants or in culture. Asexual spores are not produced, only the sexual stage... |
| Downy mildew | Bremia lactucae Bremia lactucae Bremia lactucae is a plant pathogen.- External links :* *... Plasmopara lactucae-radicis Plasmopara lactucae-radicis Plasmopara lactucae-radicis is a plant pathogen.- External links :* *... |
| Drop (Sclerotinia rot) | Sclerotinia sclerotiorum Sclerotinia sclerotiorum Sclerotinia sclerotiorum is a plant pathogenic fungus and can cause a disease called white mold if conditions are correct. S. sclerotiorum can also be known as cottony rot, watery soft rot, stem rot, drop, crown rot and blossom blight... Sclerotinia minor Sclerotinia minor Sclerotinia minor is a plant pathogen.- External links :* *... |
| Gray mold | Botrytis cinerea Botrytis cinerea Botrytis cinerea is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as botrytis bunch rot; in horticulture, it is usually called grey mould or gray mold.The fungus gives rise to two different kinds of... Botryotinia fuckeliana Botryotinia fuckeliana Botryotinia fuckeliana is a plant pathogen, and the causal agent of gray mold disease.The specific epithet was named by mycologist Heinrich Anton de Bary in honor of another mycologist, Karl Wilhelm Gottlieb Leopold Fuckel.... [teleomorph] |
| Phymatotrichum root rot (cotton root rot) | Phymatotrichopsis omnivora Phymatotrichum omnivorum |
| Powdery mildew | Erysiphe cichoracearum Erysiphe cichoracearum Erysiphe cichoracearum is a plant pathogen that causes powdery mildew disease of cucurbits, including melon, cucumber, pumpkin, and squash. The primary symptoms are white, powder-like spots on the leaves and stems. Sphaerotheca fuliginea causes a similar looking powdery mildew of cucurbits.-... |
| Rust | Puccinia dioicae Puccinia dioicae Puccinia dioicae is a plant pathogen that causes rust on goldenrod.- External links :* *... Puccinia extensicola var. hieraciata Puccinia extensicola var. hieraciata Puccinia extensicola var. hieraciata is a plant pathogen.-External links:* *... |
| Septoria leaf spot | Septoria lactucae Septoria lactucae Septoria lactucae is a fungal plant pathogen.- External links :* *... |
| Southern blight | Sclerotium rolfsii Athelia rolfsii Athelia rolfsii Athelia rolfsii is a corticioid fungus in the family Atheliaceae. It is a facultative plant pathogen and is the causal agent of "southern blight" disease in crops.-Taxonomy:... [teleomorph] |
| Stemphylium leaf spot | Stemphylium botryosum Pleospora tarda Pleospora tarda Pleospora tarda is a plant pathogen.- External links :* *... [teleomorph] |
| Wilt and leaf blight | Pythium tracheiphilum Pythium tracheiphilum Pythium tracheiphilum is a plant pathogen.- External links :* *... |
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 |
Nematodes, parasitic
| Nematodes, parasitic |
|
|---|---|
| False root knot | Nacobbus aberrans Nacobbus aberrans Nacobbus aberrans is a plant pathogenic nematode.- External links :*... |
| Lesion | Pratylenchus Pratylenchus Pratylenchus is a genus of plant-parasitic nematodes responsible for root lesions on many plant hosts in temperate regions around the world. Lesion nematodes are migratory endoparasites that enter the host root for feeding and reproduction and move freely through or out of the root tissue. They do... spp. |
| Needle | Longidorus spp. |
| Root-knot | Meloidogyne spp. |
| Spiral | Rotylenchus robustus Rotylenchus robustus Rotylenchus robustus is a plant pathogenic nematode.- External links :*... |
| Stunt | Melinius brevidens Tylenchorhynchus Tylenchorhynchus Tylenchorhynchus is a genus of nematodes including many species of plant parasites. The classification of stunt nematodes - those including the Tylenchorhynchus genus - is unstable; many newly discovered species within this genus are reconsidered to be actually subspecies... spp. |
Phytoplasma, Viral and viroid diseases
| Viral and viroid diseases |
|
|---|---|
| Big vein | Lettuce big vein virus Lettuce big-vein disease Lettuce big-vein disease causes leaf distortion and ruffling in affected lettuce plants.This disease was first associated in 1983 with a rod-shaped virus Lettuce big-vein associated virus, which is transmitted by the obligately parasitic soil-inhabiting fungus, Olpidium brassicae... |
| Calico | Alfalfa mosaic virus Alfalfa mosaic virus Alfalfa mosaic virus , also known as Lucerne mosaic virus or Potato calico virus, is a worldwide distributed phytopathogen that can lead to necrosis and yellow mosaics on a large variety of plant species, including commercially important crops. It is the only Alfamovirus of the Bromoviridae... Tobacco ringspot virus Tobacco ringspot virus Tobacco ringspot virus is a plant pathogenic virus in the plant virus family Comoviridae. It is the type species of the Comoviridae Genus Nepovirus. Nepoviruses are be transmitted between plants by nematodes... |
| Internal rib necrosis |
Lettuce mosaic virus Lettuce mosaic virus Lettuce mosaic virus is a typical potyvirus , which causes one of the major virus diseases of lettuce crops worldwide.... |
| Mosaic | Lettuce mosaic virus Lettuce mosaic virus Lettuce mosaic virus is a typical potyvirus , which causes one of the major virus diseases of lettuce crops worldwide.... Biden mosaic virus Cucumber mosaic virus Cucumber mosaic virus Cucumber mosaic virus is a plant pathogenic virus in the family Bromoviridae.It is the type member of the plant virus genus, Cucumovirus. This virus has a worldwide distribution and a very wide host range. In fact it has the reputation of having the widest host range of any known plant virus... Turnip mosaic virus Turnip mosaic virus Turnip mosaic virus is a Potyvirus of the family Potyviridae that causes diseases in cruciferous plants, among others. The virus is usually spread by 40-50 species of aphids in a non-persistent manner. Infected plants, especially the natural hosts, show symptoms such as chlorotic local lesions,... |
| Necrotic yellows | Lettuce necrotic yellows virus Lettuce necrotic yellows virus Lettuce necrotic yellows virus is a plant virus belonging to the virus order Mononegavirales, family Rhabdoviridae and genus cytorhabdovirus. It was first identified in Australia in the plant species Lactuca sativa in 1963 by Stubbs et al. Since then it has been identified in many other plant... |
| Ring necrosis | Presumed viral agent (not identified) |
| Rusty brown discoloration | Accentuated by lettuce mosaic virus Lettuce mosaic virus Lettuce mosaic virus is a typical potyvirus , which causes one of the major virus diseases of lettuce crops worldwide.... |
| Speckles | Lettuce speckles virus and beet western yellows virus Beet western yellows virus Beet western yellows virus is a plant pathogenic virus of the family Luteoviridae.-External links:**... |
| Stunt | Beet yellow stunt virus |
| Virescence | Aster yellows Aster yellows Aster yellows is a chronic, systemic plant disease caused by a bacterium-like organism called a phytoplasma. The aster yellows phytoplasma affects 300 species in 38 families of broad-leaf herbaceous plants, primarily in the aster family. Symptoms are variable and can include phyllody, virescence,... phytoplasma Phytoplasma Phytoplasma are specialised bacteria that are obligate parasites of plant phloem tissue and transmitting insects . They were first discovered by scientists in 1967 and were named mycoplasma-like organisms or MLOs. They cannot be cultured in vitro in cell-free media... Beet leafhopper-transmitted virescence phytoplasma |
| Wilt | Broadbean wilt virus Tomato spotted wilt virus |
| Yellow spot | Tobacco rattle virus Tobacco rattle virus Tobacco rattle virus is a plant pathogenic virus.-External links:**... |
| Yellows | Beet western yellows virus Beet western yellows virus Beet western yellows virus is a plant pathogenic virus of the family Luteoviridae.-External links:**... |
| Other | Sowthistle yellow vein virus Sowthistle yellow vein virus Sowthistle yellow vein virus is a plant pathogenic virus of the family Rhabdoviridae.-External links:**... |