List of pear diseases
Encyclopedia
Bacterial diseases
| Bacterial diseases |
|
|---|---|
| Crown gall | Agrobacterium tumefaciens Agrobacterium tumefaciens Agrobacterium tumefaciens is the causal agent of crown gall disease in over 140 species of dicot. It is a rod shaped, Gram negative soil bacterium... |
| Fire blight | Erwinia amylovora |
| Pseudomonas blossom blast and canker | Pseudomonas syringae Pseudomonas syringae Pseudomonas syringae is a rod shaped, Gram-negative bacterium with polar flagella. It is a plant pathogen which can infect a wide range of plant species, and exists as over 50 different pathovars, all of which are available to legitimate researches via international culture collections such as the... pv. syringae |
| Pear decline | 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... |
Fungal diseases
| Fungal diseases |
|
|---|---|
| Alternaria fruit rot | Alternaria Alternaria Alternaria is a genus of ascomycete fungi. Alternaria species are known as major plant pathogens. They are also common allergens in humans, growing indoors and causing hay fever or hypersensitivity reactions that sometimes lead to asthma... spp. |
| Anthracnose canker and bull's-eye rot | Pezicula malicorticus Cryptosporiopsis curvispora [anamorph] |
| Armillaria root rot (shoestring root rot) | Armillaria mellea Armillaria mellea Armillaria mellea is a plant pathogen and a species of Honey fungus. It causes Armillaria root rot in many plant species. The mushrooms are edible but some people may be intolerant to them. The fungus produces mushrooms around the base of trees it has infected... Rhizomorpha subcorticalis Rhizomorpha subcorticalis Rhizomorpha subcorticalis is a fungus that is a plant pathogen that causes root rot in several species, including strawberries and avocado.- External links :* *... [anamorph] |
| Bitter rot | Glomerella cingulata Glomerella cingulata Glomerella cingulata is a plant pathogenic fungus that causes disease on many different hosts including quince and apple bitter rot and anthracnose on many fruit and vegetable species. Glomerella cingulata is the sexual stage while the asexual stage is called Colletotrichum gloeosporioides.-... Colletotrichum gloeosporioides [anamorph] |
| Black rot, leaf spot and canker | Botryosphaeria obtusa Botryosphaeria obtusa Botryosphaeria obtusa is a plant pathogen. its causes Frogeye leaf spot, Black rot and cankers on many plant species. On the leaf it is referred to as Frogeye leaf spot, this phase typically affects tree and shrubs, in fruit, such as the apple, cranberry and quince, it is referred to as Black rot,... Sphaeropsis malorum [anamorph] |
| Black spot (of Japanese pear) | Alternaria alternata Alternaria alternata Alternaria alternata has been recorded causing leaf spot and other diseases on over 380 host species. It is opportunistic pathogen on numerous hosts causing leaf spots, rots and blights on many plant parts... |
| Blister canker | Helminthosporium papulosum Helminthosporium papulosum Helminthosporium papulosum is a fungal plant pathogen that causes blister canker on pear and apple.- External links :**... |
| Blister disease | Coniothecium chomatosporum Coniothecium chomatosporum Coniothecium chomatosporum is an ascomycete fungus that is a plant pathogen.- External links :* *... |
| Blue mold rot | Penicillium Penicillium Penicillium is a genus of ascomycetous fungi of major importance in the natural environment as well as food and drug production. Members of the genus produce penicillin, a molecule that is used as an antibiotic, which kills or stops the growth of certain kinds of bacteria inside the body... spp. Penicillium expansum Penicillium expansum Penicillium expansum is a plant pathogen. It is a blue-colored mold responsible for the postharvest decay of stored apples. This mold also produces the carcinogenic metabolite patulin.- External links :* *... |
| Botrytis spur and blossom blight | 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 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... [teleomorph] |
| Brown rot | Monilinia fructicola Monilinia fructicola Monilinia fructicola is a species of fungus in the order Helotiales. A plant pathogen, it is the causal agent of brown rot of stone fruits.-Stone Fruit :... Monilinia laxa Monilinia laxa Monilinia laxa is a plant pathogen, which is the causal agent of brown rot of stone fruits. - External links :* *... |
| Cladosporium fruit rot | Cladosporium herbarum Cladosporium herbarum Cladosporium herbarum is a fungal plant pathogen. Its hosts include Bryum, Buxbaumia, Gyroweissia, Tortula, and Dicranella.- External links :**... Mycosphaerella tassiana [teleomorph] |
| Clitocybe root rot (mushroom root rot) |
Armillaria tabescens Armillaria tabescens Armillaria tabescens is a species of fungus in the Physalacriaceae family of mushroom. It is a plant pathogen.- External links :* *... Clitocybe tabescens |
| Coprinus rot | Coprinus psychromorbidus |
| Dematophora root rot (Rosellinia root rot) | Rosellinia necatrix Rosellinia necatrix Rosellinia necatrix is a plant pathogen.- External links :* *... Dematophora necatrix [anamorph] |
| Diplodia canker | Botryosphaeria stevensii Botryosphaeria stevensii Botryosphaeria stevensii is a plant pathogen that causes cankers on several tree species including apple as well as black dead arm on grape.- External links :* *... Physalospora malorum Diplodia mutila [anamorph] |
| Elsinoe leaf and fruit spot | Elsinoe piri Elsinoë piri Elsinoë piri is a plant pathogen.- External links :* *... Sphaceloma pirinum [anamorph] |
| European canker | Nectria galligena Cylindrocarpon heteronemum [anamorph] |
| Fabraea leaf and fruit spot | Diplocarpon mespili Diplocarpon mespili Diplocarpon mespili is a plant pathogen.- External links :* *... Fabraea maculata Entomosporium mespili [anamorph] |
| Fly speck | Schizothyrium pomi Schizothyrium pomi Schizothyrium pomi is a plant pathogen.- External links :* *... Zygophiala jamaicensis [anamorph] |
| Gibberella canker | Gibberella baccata Gibberella baccata Gibberella baccata is a fungal plant pathogen.- External links :* *... Fusarium lateritium [anamorph] |
| Gray mold rot | 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... |
| Late leaf spot | Cercospora minima Cercospora minima Cercospora minima is a fungal plant pathogen. In the European Pear it is the cause of the disease known as late leaf spot. The geographic distribution includes India, South America, and the south-eastern United States.- External links :**... |
| Mucor fruit rot | Mucor Mucor Mucor is a microbial genus of about 3000 species of moulds commonly found in soil, digestive systems, plant surfaces, and rotten vegetable matter.-Description:... spp. Mucor piriformis Mucor piriformis Mucor piriformis is a plant pathogen that causes a soft rot of several fruits known as Mucor rot. Infection of its host fruits, such as apples and pears takes place post-harvest.- External links :... |
| Mycosphaerella leaf spot (ashy leaf spot and fruit spot) | Mycosphaerella pyri Mycosphaerella pyri Mycosphaerella pyri is a fungal plant pathogen.-External links:* *... Mycosphaerella sentina Septoria pyricola [anamorph] |
| Nectria twig blight (coral spot) | Nectria cinnabarina Nectria cinnabarina Nectria cinnabarina is a plant pathogen that causes cankers on many tree species and also a disease known as coral spot.- External links :* *... Tubercularia vulgaris [anamorph] |
| Pear scab | Venturia pirina Venturia pirina Venturia pirina is a plant pathogen.- External links :* *... Fusicladium pyrorum [anamorph] |
| Perennial canker | Neofabraea perennans Neofabraea perennans Neofabraea perennans is a plant pathogen.- External links :* *... Cryptosporiopsis perennans [anamorph] |
| Phyllosticta leaf spot | Phyllosticta Phyllosticta Phyllosticta is a genus of fungi. Many of the species in this genus are plant pathogens.-Species:*Phyllosticta aberiae*Phyllosticta abietis*Phyllosticta abortiva*Phyllosticta abramovii*Phyllosticta abricola... sp. |
| Phytophthora crown and root rot (sprinkler rot) | Phytophthora cactorum Phytophthora cactorum Phytophthora cactorum is a plant pathogen that causes root rot on rhododendron and many other species.- External links :* *... |
| Pink mold rot | Trichothecium roseum Trichothecium roseum Trichothecium roseum is a plant pathogen.- External links :* *... Cephalothecium roseum |
| Powdery mildew | Podosphaera leucotricha Podosphaera leucotricha Podosphaera leucotricha is a plant pathogen.- External links :* *... |
| Pythium dieback | Pythium Pythium Pythium is a genus of parasitic oomycete. Most species are plant parasites, but Pythium insidiosum is an important pathogen of animals... spp. |
| Rhizopus rot | Rhizopus stolonifer |
| Rust, American hawthorne | Gymnosporangium globosum Gymnosporangium globosum Gymnosporangium globosum is a plant pathogen that causes cedar-hawthorn rust.- External links :... |
| Rust, Kern's pear | Gymnosporangium kernianum Gymnosporangium kernianum Gymnosporangium kernianum is a plant pathogen.- External links :* *... |
| Rust, Pacific Coast pear | Gymnosporangium libocedri Gymnosporangium libocedri Gymnosporangium libocedri is a plant pathogen.- External links :**... |
| Rust, pear trellis (European pear rust) | Gymnosporangium fuscum Gymnosporangium fuscum Gymnosporangium sabinae is a fungal heteroecious plant pathogen with Juniperus as the primary host and Pyrus , Malus , or Crataegus as secondary hosts... |
| Rust, Rocky Mountain pear | Gymnosporangium nelsonii Gymnosporangium nelsonii Gymnosporangium nelsonii is a plant pathogen.- External links :* *... |
| Side rot | Phialophora malorum |
| Silver leaf | Chondrostereum purpureum Chondrostereum purpureum Silver leaf is a fungal disease of trees caused by the fungus plant pathogen Chondrostereum purpureum. It attacks most species of the rose family Rosaceae, particularly the genus Prunus. The disease is progressive and often fatal. The common name is taken from the progressive silvering of leaves on... |
| Sooty blotch | Gloeodes pomigena |
| Thread blight (Hypochnus leaf blight) | Corticium stevensii Hypochnus ochroleucus |
| Valsa canker | Valsa ceratosperma Valsa ceratosperma Valsa ceratosperma is a plant pathogen.- External links :* *... Cytospora sacculus Cytospora sacculus Cytospora sacculus is a plant pathogen.- External links :... [anamorph] |
| Wood rot | Trametes versicolor Trametes versicolor Trametes versicolor — formerly known as Coriolus versicolor and Polyporus versicolor — is an extremely common polypore mushroom which can be found throughout the world. Versicolor means 'of several colours' and it is true that this mushroom is found in a wide variety of different colours. T... and various basidiomycetes |
| Xylaria root rot | Xylaria Xylaria Xylaria is a genus of ascomycetous fungi commonly found growing on dead wood. The name comes from the Greek xýlon meaning wood .Two of the common species of the genus are Xylaria hypoxylon and Xylaria polymorpha.... spp. |
Miscellaneous diseases and disorders
| Miscellaneous diseases and disorders |
|
|---|---|
| Alfalfa greening (green stain) | Unknown |
| Bitter pit | Localized calcium deficiency |
| Black end | Water imbalance |
| Black speck (skin speckling) | Associated with low oxygen in storage |
| Blossom blast | Boron deficiency |
| Brown core | High CO2 |
| Core breakdown (Bartlett) | Senescence |
| Core spot | Associated with calcium deficiency |
| Green stain | Unknown |
| Internal bark necrosis | Unknown |
| Mealy core (d`Anjou) | Senescence |
| Pink end (Bartlett) | Preharvest low temperature |
| Rosette | Unknown |
| Scald | Senescence |
Nematodes, parasitic
| Nematodes, parasitic |
|
|---|---|
| Dagger, American | Xiphinema americanum Xiphinema americanum Xiphinema americanum is a plant pathogenic nematode. It is one of many species that belongs to the genus Xiphinema. It was first described by N. A. Cobb in 1913, who found it on both sides of the United States on the roots of grass, corn, and citrus trees. Not only is Xiphinema americanum known to... |
| Dagger | Xiphinema riveri Xiphinema vuittenezi Xiphinema vuittenezi Xiphinema vuittenezi 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. Pratylenchus penetrans Pratylenchus penetrans Pratylenchus penetrans is a plant pathogenic nematode.- External links :*... |
| Pin | Paratylenchus Paratylenchus Paratylenchus is a genus of nematodes . Many of the species in this genus are plant pathogens.... spp. |
| Root-knot | Meloidogyne spp. |
Viruslike diseases
| Viruslike diseases |
|
|---|---|
| Flemish beauty corky pit | Virus suspected |
| Pear blister canker | Virus suspected |
| Pear decline | Phytoplasma |
| Pear freckle pit | Virus suspected |
| Pear red mottle | Virus suspected |
| Pear ring pattern mosaic | Virus suspected |
| Pear rough bark | Virus suspected |
| Pear stony pit | Virus suspected |
| Pear vein yellows | Virus suspected |
| Quince bark necrosis | Virus suspected |
| Quince sooty ring spot | Virus suspected |
| Quince stunt | Virus suspected |
| Quince yellow blotch | Virus suspected |