List of pear diseases
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This article is a list of diseases of pears (Pyrus communis).
Contents |
[edit] Bacterial diseases
Bacterial diseases |
|
---|---|
Crown gall | Agrobacterium tumefaciens |
Fire blight | Erwinia amylovora |
Pseudomonas blossom blast and canker | Pseudomonas syringae pv. syringae |
[edit] Fungal diseases
Fungal diseases |
|
---|---|
Alternaria fruit rot | Alternaria spp. |
Anthracnose canker and bull's-eye rot | Pezicula malicorticus Cryptosporiopsis curvispora [anamorph] |
Armillaria root rot (shoestring root rot) | Armillaria mellea Rhizomorpha subcorticalis [anamorph] |
Bitter rot | Glomerella cingulata Colletotrichum gloeosporioides [anamorph] |
Black rot, leaf spot and canker | Botryosphaeria obtusa Sphaeropsis malorum [anamorph] |
Black spot (of Japanese pear) | Alternaria alternata |
Blister canker | Helminthosporium papulosum |
Blister disease | Coniothecium chromatosporum |
Blue mold rot | Penicillium spp. P. expansum |
Botrytis spur and blossom blight | Botrytis cinerea Botryotinia fuckeliana [teleomorph] |
Brown rot | Monilinia fructicola M. laxa |
Cladosporium fruit rot | Cladosporium herbarum Mycosphaerella tassiana [teleomorph] |
Clitocybe root rot (mushroom root rot) |
Armillaria tabescens = Clitocybe tabescens |
Coprinus rot | Coprinus psychromorbidus |
Dematophora root rot (Rosellinia root rot) | Rosellinia necatrix Dematophora necatrix [anamorph] |
Diplodia canker | Botryosphaeria stevensii = Physalospora malorum Diplodia mutila [anamorph] |
Elsinoe leaf and fruit spot | Elsinoe piri Sphaceloma pirinum [anamorph] |
European canker | Nectria galligena Cylindrocarpon heteronemum [anamorph] |
Fabraea leaf and fruit spot | Diplocarponmespili = Fabraea maculata Entomosporium mespili [anamorph] |
Fly speck | Schizothyrium pomi Zygophiala jamaicensis [anamorph] |
Gibberella canker | Gibberella baccata Fusarium lateritium [anamorph] |
Gray mold rot | Botrytis cinerea |
Late leaf spot | Cercospora minima |
Mucor fruit rot | Mucor spp. M. piriformis |
Mycosphaerella leaf spot (ashy leaf spot and fruit spot) | Mycosphaerella pyri = M. sentina Septoria pyricola [anamorph] |
Nectria twig blight (coral spot) | Nectria cinnabarina Tubercularia vulgaris [anamorph] |
Pear scab | Venturia pirina Fusicladium pyrorum [anamorph] |
Perennial canker | Neofabrae perennans Cryptosporiopsis perennans [anamorph] |
Phyllosticta leaf spot | Phyllosticta sp. |
Phytophthora crown and root rot (sprinkler rot) | Phytophthora cactorum |
Pink mold rot | Trichothecium roseum = Cephalothecium roseum |
Powdery mildew | Podosphaera leucotricha |
Pythium dieback | Pythium spp. |
Rhizopus rot | Rhizopus stolonifer |
Rust, American hawthorne | Gymnosporangium globosum |
Rust, Kern's pear | Gymnosporangium kernianum |
Rust, Pacific Coast pear | Gymnosporangium libocedri |
Rust, pear trellis (European pear rust) | Gymnosporangium fuscum |
Rust, Rocky Mountain pear | Gymnosporangium nelsonii |
Side rot | Phialophora malorum |
Silver leaf | Chondrostereum pupureum |
Sooty blotch | Gloeodes pomigena |
Thread blight (Hypochnus leaf blight) | Corticium stevensii = Pellicularia koleroga = Hypochnus ochroleucus |
Valsa canker | Valsa ceratosperma Cytospora sacculus [anamorph] |
Wood rot | Trametes versicolor and various basidiomycetes |
Xylaria root rot | Xylaria spp. |
[edit] 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 |
[edit] Nematodes, parasitic
Nematodes, parasitic |
|
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Dagger, American | Xiphinema americanum |
Dagger | X. riveri X. vuittenezi |
Lesion | Pratylenchus spp. P. penetrans |
Pin | Paratylenchus spp. |
Root-knot | Meloidogyne spp. |
[edit] Viruslike diseases
(Also mycoplasmalike organism [MLO])
Viruslike diseases |
|
---|---|
Flemish beauty corky pit | Virus suspected |
Pear blister canker | Virus suspected |
Pear decline | MLO |
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 |