Pyrus communis L.
(Pear)

Interactions where Pyrus communis is the victim or passive partner (and generally loses out from the process)

The following relationships have been collated from the published literature (see 'Interaction References').

Filters:

Affected Part Summary Taxon Vernacular Classification References Darwin Classification of Active Taxon Active Taxon Active Vernacular Active Taxon Uncertain Active State Active Part Active Stage Relationship Relationship Uncertain Relationship Geography Darwin Classification of Passive Taxon Passive Taxon Passive Vernacular Passive Taxon Uncertain Passive State Passive Part Passive Stage Passive Taxon's significance to Active Taxon Indoors etc Season Summary
has sap sucked by Minor Pentatoma rufipes Forest Bug, Red-legged Shield Bug Hemiptera: Pentatomidae Land and Water Bugs of the British Isles, Southwood, T.R.E. & Leston, D., 1959
 /Animalia/Arthropoda/Insecta/Hemiptera/Pentatomidae/Pentatoma rufipes/Pentatoma rufipesforest bug, red-legged shield bug Foodplant / sap sucker /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearMinor sucks sap of
leaf bud has sap sucked by nymph Cacopsylla pyricola Pear Sucker Hemiptera: Psyllidae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Insecta/Hemiptera/Psyllidae/Cacopsylla pyricola/Cacopsylla pyricolapear suckernymph Foodplant / sap sucker /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearleaf bud (4-5)nymph sucks sap of leaf bud
(discoloured, distorted) discoloured, distorted flower has sap sucked by nymph Cacopsylla pyricola Pear Sucker Hemiptera: Psyllidae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Insecta/Hemiptera/Psyllidae/Cacopsylla pyricola/Cacopsylla pyricolapear suckernymph Foodplant / sap sucker /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardiscoloured, distortedflower (4-5)nymph sucks sap of discoloured, distorted flower
(fouled, sticky, mouldy) fouled, sticky, mouldy fruit has sap sucked by nymph Cacopsylla pyricola Pear Sucker Hemiptera: Psyllidae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Insecta/Hemiptera/Psyllidae/Cacopsylla pyricola/Cacopsylla pyricolapear suckernymph Foodplant / sap sucker /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfouled, sticky, mouldyfruit nymph sucks sap of fouled, sticky, mouldy fruit
(fouled, sticky, mouldy) fouled, sticky, mouldy leaf has sap sucked by nymph Cacopsylla pyricola Pear Sucker Hemiptera: Psyllidae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Insecta/Hemiptera/Psyllidae/Cacopsylla pyricola/Cacopsylla pyricolapear suckernymph Foodplant / sap sucker /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfouled, sticky, mouldyleaf nymph sucks sap of fouled, sticky, mouldy leaf
(live) live may be infected and damaged by [Apple Rubbery Wood phytoplasma] a phytopathogenic phytoplasma Acholeplasmatales: Acholeplasmataceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Firmicutes/Mollicutes/Acholeplasmatales/Acholeplasmataceae/Apple Rubbery Wood phytoplasma/Apple Rubbery Wood phytoplasmaa phytopathogenic phytoplasma Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive infects and damages live
(live) live may have larva Taeniothrips inconsequens Pear Thrips Thysanoptera: Thripidae Thysanoptera, Mound L.A., Morison, G.D., Pitkin, B.R. & Palmer, J.M., 1976
 /Animalia/Arthropoda/Insecta/Thysanoptera/Thripidae/Taeniothrips inconsequens/Taeniothrips inconsequenspear thripslarva Plant / resting place / on /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive (4-6,9)larva may be found on live
(live) live may have female Taeniothrips inconsequens Pear Thrips Thysanoptera: Thripidae Thysanoptera, Mound L.A., Morison, G.D., Pitkin, B.R. & Palmer, J.M., 1976
 /Animalia/Arthropoda/Insecta/Thysanoptera/Thripidae/Taeniothrips inconsequens/Taeniothrips inconsequenspear thripsfemale Plant / resting place / on /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive (3-6,11)female may be found on live
(live) live may have male Taeniothrips inconsequens Pear Thrips Thysanoptera: Thripidae Thysanoptera, Mound L.A., Morison, G.D., Pitkin, B.R. & Palmer, J.M., 1976
 /Animalia/Arthropoda/Insecta/Thysanoptera/Thripidae/Taeniothrips inconsequens/Taeniothrips inconsequenspear thripsmale Plant / resting place / on /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive (3-6,115)male may be found on live
bark (dark green-brown lesioned) dark green-brown lesioned bark may be infected and damaged by Erwinia amylovora Fireblight Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Erwinia amylovora/Erwinia amylovorafireblight Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardark green-brown lesionedbark infects and damages dark green-brown lesioned bark
branch (cankered) cankered branch may be infected and damaged by scattered or clustered, immersed, then semi-immersed, finally superficial pycnidium of Phomopsis coelomycetous anamorph UK/Ireland Phomopsis perniciosa a coelomycete Diaporthales: Diaporthaceae British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia, Grove, W.B., 1935
 /Fungi/Ascomycota/Sordariomycetes/Diaporthales/Diaporthaceae/Phomopsis perniciosa/Phomopsis perniciosaa coelomycetescattered or clustered, immersed, then semi-immersed, finally superficialpycnidiumPhomopsis coelomycetous anamorph Foodplant / pathogenUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearcankeredbranch scattered or clustered, immersed, then semi-immersed, finally superficial pycnidium of Phomopsis coelomycetous anamorph infects and damages cankered branch
bud (live) live bud may contain caterpillar Zeuzera pyrina Leopard Moth Lepidoptera: Cossidae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Insecta/Lepidoptera/Cossidae/Zeuzera pyrina/Zeuzera pyrinaleopard mothcaterpillar Foodplant / internal feeder /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlivebud caterpillar feeds within live bud
cambium (live) live cambium may contain larva Anisandrus dispar Shot-hole Borer Coleoptera: Curculionidae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Insecta/Coleoptera/Curculionidae/Anisandrus dispar/Anisandrus disparshot-hole borerlarva Foodplant / internal feeder /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlivecambium larva feeds within live cambium
flower bud (dead) dead flower bud may be infected and damaged by pink pustule of Fusarium anamorph Rare Gibberella baccata Apple Bud Rot, Mulberry Canker and Dieback - causative organism Hypocreales: Nectriaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Sordariomycetes/Hypocreales/Nectriaceae/Gibberella baccata/Gibberella baccataapple bud rot, mulberry canker and dieback (causative organism)pinkpustuleFusarium anamorph Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardeadflower budRare pink pustule of Fusarium anamorph infects and damages dead flower bud
flower flower may be infected and damaged by UK/Ireland Pseudomonas syringae Pear Bacterial Blight - causative organism Pseudomonadales: Pseudomonadaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Proteobacteria/Gammaproteobacteria/Pseudomonadales/Pseudomonadaceae/Pseudomonas syringae/Pseudomonas syringaepear bacterial blight (causative organism) Foodplant / pathogenUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearflower infects and damages flower
flower flower is visited for nectar and/or pollen by imago Hoplocampa brevis a sawfly Hymenoptera: Tenthredinidae Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958
 /Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Hoplocampa brevis/Hoplocampa brevisa sawflyimago Foodplant / visitor /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearflower imago visits for nectar and/or pollen flower
flower (dead, brown, hanging, scorched-looking) dead, brown, hanging, scorched-looking flower may be infected and damaged by Erwinia amylovora Fireblight Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Erwinia amylovora/Erwinia amylovorafireblight Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardead, brown, hanging, scorched-lookingflower infects and damages dead, brown, hanging, scorched-looking flower
flower (live, wilted) live, wilted flower may be infected and damaged by sporodochium of Monilia dematiaceous anamorph Monilinia laxa a brown rot of tree fruit (causative organism) Helotiales: Sclerotiniaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Leotiomycetes/Helotiales/Sclerotiniaceae/Monilinia laxa/Monilinia laxaa brown rot of tree fruit (causative organism)sporodochiumMonilia dematiaceous anamorph Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive, wiltedflower sporodochium of Monilia dematiaceous anamorph infects and damages live, wilted flower
fruit fruit is spotted by black pycnidium of Ascochyta coelomycetous anamorph UK/Ireland Ascochyta pirina a coelomycete Pleosporales British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia, Grove, W.B., 1935
 /Fungi/Ascomycota/Dothideomycetes/Pleosporales/Ascochyta pirina/Ascochyta pirinaa coelomyceteblackpycnidiumAscochyta coelomycetous anamorph Foodplant / spot causerUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfruit black pycnidium of Ascochyta coelomycetous anamorph causes spots on fruit
fruit fruit may be infected and damaged by conidioma of Phlyctema coelomycetous anamorph Minor Neofabraea alba a discomycete Helotiales: Dermateaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Leotiomycetes/Helotiales/Dermateaceae/Neofabraea alba/Neofabraea albaa discomyceteconidiomaPhlyctema coelomycetous anamorph Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfruitMinor conidioma of Phlyctema coelomycetous anamorph infects and damages fruit
fruit fruit may be infected and damaged by Major Glomerella cingulata Willow Black Canker - causative organism Glomerellaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Sordariomycetes/Glomerellaceae/Glomerella cingulata/Glomerella cingulatawillow black canker (causative organism) Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfruitMajor infects and damages fruit
fruit fruit may be infected and damaged by Gibberella baccata Apple Bud Rot, Mulberry Canker and Dieback - causative organism Hypocreales: Nectriaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Sordariomycetes/Hypocreales/Nectriaceae/Gibberella baccata/Gibberella baccataapple bud rot, mulberry canker and dieback (causative organism) Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfruit infects and damages fruit
fruit fruit may be infected and damaged by Rhizopus stolonifer a pin mould Mucorales: Rhizopodaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Zygomycota/Zygomycetes/Mucorales/Rhizopodaceae/Rhizopus stolonifer/Rhizopus stolonifera pin mould Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfruit infects and damages fruit
fruit (cankered) cankered fruit may be infected and damaged by scattered or clustered, immersed, then semi-immersed, finally superficial pycnidium of Phomopsis coelomycetous anamorph UK/Ireland Phomopsis perniciosa a coelomycete Diaporthales: Diaporthaceae British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia, Grove, W.B., 1935
 /Fungi/Ascomycota/Sordariomycetes/Diaporthales/Diaporthaceae/Phomopsis perniciosa/Phomopsis perniciosaa coelomycetescattered or clustered, immersed, then semi-immersed, finally superficialpycnidiumPhomopsis coelomycetous anamorph Foodplant / pathogenUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearcankeredfruit scattered or clustered, immersed, then semi-immersed, finally superficial pycnidium of Phomopsis coelomycetous anamorph infects and damages cankered fruit
fruit (dead, brown-black, wrinkled) dead, brown-black, wrinkled fruit may be infected and damaged by Erwinia amylovora Fireblight Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Erwinia amylovora/Erwinia amylovorafireblight Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardead, brown-black, wrinkledfruit infects and damages dead, brown-black, wrinkled fruit
fruit (developing, usually falls when larva matures) developing, usually falls when larva matures fruit may contain larva Restricted Hoplocampa brevis a sawfly Hymenoptera: Tenthredinidae Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958
 /Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Hoplocampa brevis/Hoplocampa brevisa sawflylarva Foodplant / internal feeder /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardeveloping, usually falls when larva maturesfruitSole larva feeds within developing, usually falls when larva matures fruit
fruit (fallen) fallen fruit may be infected and damaged by Phytophthora cactorum Strawberry Crown Rot - causative organism Peronosporales: Peronosporaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Chromista/Oomycota/Peronosporea/Peronosporales/Peronosporaceae/Phytophthora cactorum/Phytophthora cactorumstrawberry crown rot (causative organism) Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfallenfruit infects and damages fallen fruit
fruit (fallen) fallen fruit may be infected and damaged by Phytophthora syringae a blight Peronosporales: Peronosporaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Chromista/Oomycota/Peronosporea/Peronosporales/Peronosporaceae/Phytophthora syringae/Phytophthora syringaea blight Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearfallenfruit infects and damages fallen fruit
fruit (live, fallen, brown-rotten) live, fallen, brown-rotten fruit may be infected and damaged by sporodochium of Monilia dematiaceous anamorph Monilinia fructigena Apple Brown Rot - causative organism Helotiales: Sclerotiniaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Leotiomycetes/Helotiales/Sclerotiniaceae/Monilinia fructigena/Monilinia fructigenaapple brown rot (causative organism)sporodochiumMonilia dematiaceous anamorph Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive, fallen, brown-rottenfruit sporodochium of Monilia dematiaceous anamorph infects and damages live, fallen, brown-rotten fruit
fruit (live, sometimes dwarfed) live, sometimes dwarfed fruit is spotted by colony of Gloeodes anamorph Gloeodes pomigena Sooty Blotch Disease - causative organism Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Gloeodes pomigena/Gloeodes pomigenasooty blotch disease (causative organism)colonyGloeodes anamorph Foodplant / spot causer /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive, sometimes dwarfedfruit colony of Gloeodes anamorph causes spots on live, sometimes dwarfed fruit
fruit (live) live fruit is parasitised by aecium ForeignMinor Gymnosporangium clavariiforme European Hawthorn Rust, Tongues Of Fire Pucciniales: Pucciniaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Gymnosporangium clavariiforme/Gymnosporangium clavariiformeeuropean hawthorn rust, tongues of fireaecium Foodplant / parasiteForeign /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlivefruitMinor (7-9+)aecium parasitises live fruit
fruit (live) live fruit is parasitised by clustered pycnium Minor Gymnosporangium clavariiforme European Hawthorn Rust, Tongues Of Fire Pucciniales: Pucciniaceae Gymnosporangium clavariiforme (Pers.) DC., Laundon, G., 1977
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Gymnosporangium clavariiforme/Gymnosporangium clavariiformeeuropean hawthorn rust, tongues of fireclusteredpycnium Foodplant / parasite /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlivefruitMinor clustered pycnium parasitises live fruit
fruit (rotten) rotten fruit may be infected and damaged by conidioma of Cryptosporiopsis coelomycetous anamorph Minor Pezicula malicorticis a discomycete Helotiales: Dermateaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Leotiomycetes/Helotiales/Dermateaceae/Pezicula malicorticis/Pezicula malicorticisa discomyceteconidiomaCryptosporiopsis coelomycetous anamorph Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearrottenfruitMinor conidioma of Cryptosporiopsis coelomycetous anamorph infects and damages rotten fruit
fruit (rotting) rotting fruit is decayed by Mucor piriformis a pin-mould Mucorales: Mucoraceae Mucor piriformis A. Fisch., Kirk, P.M., 1997
 /Fungi/Zygomycota/Zygomycetes/Mucorales/Mucoraceae/Mucor piriformis/Mucor piriformisa pin-mould Foodplant / saprobe /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearrottingfruit is saprobic on rotting fruit
fruit (soft, brown, rotten, musty-smelling) soft, brown, rotten, musty-smelling fruit may be infected and damaged by colony of Penicillium dematiaceous anamorph Major Penicillium expansum a dematiaceous anamorphic fungus Eurotiales: Trichocomaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Penicillium expansum, Kozakiewicz, Z., 1995
 /Fungi/Ascomycota/Eurotiomycetes/Eurotiales/Trichocomaceae/Penicillium expansum/Penicillium expansuma dematiaceous anamorphic funguscolonyPenicillium dematiaceous anamorph Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearsoft, brown, rotten, musty-smellingfruitMajor colony of Penicillium dematiaceous anamorph infects and damages soft, brown, rotten, musty-smelling fruit
leaf bud (dead) dead leaf bud may be infected and damaged by pink pustule of Fusarium anamorph Rare Gibberella baccata Apple Bud Rot, Mulberry Canker and Dieback - causative organism Hypocreales: Nectriaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Sordariomycetes/Hypocreales/Nectriaceae/Gibberella baccata/Gibberella baccataapple bud rot, mulberry canker and dieback (causative organism)pinkpustuleFusarium anamorph Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardeadleaf budRare pink pustule of Fusarium anamorph infects and damages dead leaf bud
leaf leaf is grazed by larva Restricted Pristiphora abbreviata a sawfly Hymenoptera: Tenthredinidae Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958
 /Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Pristiphora abbreviata/Pristiphora abbreviataa sawflylarva Foodplant / open feeder /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearleafSole larva grazes on leaf
leaf leaf is spotted by epiphyllous, few, minute, black Septoria coelomycetous anamorph UK/Ireland Mycosphaerella pyri Pear Leaf Fleck - causative organism Capnodiales: Mycosphaerellaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia, Grove, W.B., 1935
 /Fungi/Ascomycota/Dothideomycetes/Capnodiales/Mycosphaerellaceae/Mycosphaerella pyri/Mycosphaerella pyripear leaf fleck (causative organism)epiphyllous, few, minute, blackSeptoria coelomycetous anamorph Foodplant / spot causerUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearleaf (7-10)epiphyllous, few, minute, black Septoria coelomycetous anamorph causes spots on leaf
leaf leaf is spotted by amphigenous, erumpent pseudothecium Mycosphaerella pyri Pear Leaf Fleck - causative organism Capnodiales: Mycosphaerellaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
 /Fungi/Ascomycota/Dothideomycetes/Capnodiales/Mycosphaerellaceae/Mycosphaerella pyri/Mycosphaerella pyripear leaf fleck (causative organism)amphigenous, erumpentpseudothecium Foodplant / spot causer /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearleaf amphigenous, erumpent pseudothecium causes spots on leaf
leaf leaf is spotted by black pycnidium of Ascochyta coelomycetous anamorph UK/Ireland Ascochyta pirina a coelomycete Pleosporales British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia, Grove, W.B., 1935
 /Fungi/Ascomycota/Dothideomycetes/Pleosporales/Ascochyta pirina/Ascochyta pirinaa coelomyceteblackpycnidiumAscochyta coelomycetous anamorph Foodplant / spot causerUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearleaf black pycnidium of Ascochyta coelomycetous anamorph causes spots on leaf
leaf (dead, brown, hanging, scorched-looking) dead, brown, hanging, scorched-looking leaf may be infected and damaged by Erwinia amylovora Fireblight Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Erwinia amylovora/Erwinia amylovorafireblight Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardead, brown, hanging, scorched-lookingleaf infects and damages dead, brown, hanging, scorched-looking leaf
leaf (dry) dry leaf is decayed by hypophyllous, densely gregarious, immersed or part erumpent pseudothecium Mycosphaerella pyri Pear Leaf Fleck - causative organism Capnodiales: Mycosphaerellaceae Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
 /Fungi/Ascomycota/Dothideomycetes/Capnodiales/Mycosphaerellaceae/Mycosphaerella pyri/Mycosphaerella pyripear leaf fleck (causative organism)hypophyllous, densely gregarious, immersed or part erumpentpseudothecium Foodplant / saprobe /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardryleaf hypophyllous, densely gregarious, immersed or part erumpent pseudothecium is saprobic on dry leaf
leaf (live, curled, discoloured) live, curled, discoloured leaf has sap sucked by Dysaphis pyri Pear-bedstraw Aphid Hemiptera: Aphididae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Insecta/Hemiptera/Aphididae/Dysaphis (Pomaphis) pyri/Dysaphis (Pomaphis) pyripear-bedstraw aphid Foodplant / sap sucker /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive, curled, discolouredleaf (early spring-7, autumn-)sucks sap of live, curled, discoloured leaf
leaf (live) live leaf is grazed by epiphyllous, colonial Bryobia bryobia mites Trombidiformes: Tetranychidae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Arachnida/Trombidiformes/Tetranychidae/Bryobia/Bryobiabryobia mitesepiphyllous, colonial Foodplant / open feeder /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearliveleaf epiphyllous, colonial grazes on live leaf
leaf (live) live leaf is grazed by web-dwelling hypophyllous, colonial Panonychus ulmi Fruit Tree Red Spider Mite Trombidiformes: Tetranychidae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Animalia/Arthropoda/Arachnida/Trombidiformes/Tetranychidae/Panonychus ulmi/Panonychus ulmifruit tree red spider mitehypophyllous, colonial Foodplant / web feeder /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearliveleaf (4-)hypophyllous, colonial feeds from web on live leaf
leaf (live) live leaf is spotted by epiphyllous, subcuticular acervulus of Entomosporium coelomycetous anamorph Rare Diplocarpon mespili Quince Leaf Blight Helotiales: Dermateaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Leotiomycetes/Helotiales/Dermateaceae/Diplocarpon mespili/Diplocarpon mespiliquince leaf blightepiphyllous, subcuticularacervulusEntomosporium coelomycetous anamorph Foodplant / spot causer /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearliveleafRare epiphyllous, subcuticular acervulus of Entomosporium coelomycetous anamorph causes spots on live leaf
leaf (live) live leaf is galled by mostly hypophyllous aecium Foreign Gymnosporangium asiaticum Japanese Pear Rust Pucciniales: Pucciniaceae Gymnosporangium asiaticum Miyabe ex Yamada, Laundon, G., 1977
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Gymnosporangium asiaticum/Gymnosporangium asiaticumJapanese pear rustmostly hypophyllousaecium Foodplant / gallForeign /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearliveleaf mostly hypophyllous aecium causes gall of live leaf
leaf (live) live leaf is parasitised by epiphyllous pycnium Foreign Gymnosporangium asiaticum Japanese Pear Rust Pucciniales: Pucciniaceae Gymnosporangium asiaticum Miyabe ex Yamada, Laundon, G., 1977
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Gymnosporangium asiaticum/Gymnosporangium asiaticumJapanese pear rustepiphyllouspycnium Foodplant / parasiteForeign /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearliveleaf epiphyllous pycnium parasitises live leaf
leaf (live) live leaf is galled by hypophyllous aecium ForeignMinor Gymnosporangium clavariiforme European Hawthorn Rust, Tongues Of Fire Pucciniales: Pucciniaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Gymnosporangium clavariiforme/Gymnosporangium clavariiformeeuropean hawthorn rust, tongues of firehypophyllousaecium Foodplant / gallForeign /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearliveleafMinor (7-9+)hypophyllous aecium causes gall of live leaf
leaf (live) live leaf is parasitised by epiphyllous, clustered pycnium Minor Gymnosporangium clavariiforme European Hawthorn Rust, Tongues Of Fire Pucciniales: Pucciniaceae Gymnosporangium clavariiforme (Pers.) DC., Laundon, G., 1977
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Gymnosporangium clavariiforme/Gymnosporangium clavariiformeeuropean hawthorn rust, tongues of fireepiphyllous, clusteredpycnium Foodplant / parasite /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearliveleafMinor epiphyllous, clustered pycnium parasitises live leaf
leaf (yellowing, prematurely falling) yellowing, prematurely falling leaf may be infected and damaged by Major Rosellinia necatrix White Root Rot - causative organism Xylariales: Xylariaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Ascomycota/Sordariomycetes/Xylariales/Xylariaceae/Rosellinia necatrix/Rosellinia necatrixwhite root rot (causative organism) Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearyellowing, prematurely fallingleafMajor infects and damages yellowing, prematurely falling leaf
ovary ovary may house ovum Restricted Hoplocampa brevis a sawfly Hymenoptera: Tenthredinidae Hymenoptera: 2. Symphyta. Section (c), Benson, R.B., 1958
 /Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Hoplocampa brevis/Hoplocampa brevisa sawflyovum Plant / resting place / within /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearovarySole ovum may be found in ovary
petiole (live, swollen) live, swollen petiole is galled by aecium ForeignMinor Gymnosporangium clavariiforme European Hawthorn Rust, Tongues Of Fire Pucciniales: Pucciniaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Gymnosporangium clavariiforme/Gymnosporangium clavariiformeeuropean hawthorn rust, tongues of fireaecium Foodplant / gallForeign /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlive, swollenpetioleMinor (7-9+)aecium causes gall of live, swollen petiole
stem (esp. base) stem (esp. base) is galled by Rhizobium radiobacter Crown Gall - causative organism Rhizobiales: Rhizobiaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Proteobacteria/Alphaproteobacteria/Rhizobiales/Rhizobiaceae/Rhizobium radiobacter/Rhizobium radiobactercrown gall (causative organism) Foodplant / gall /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearstem (esp. base) causes gall of stem (esp. base)
stem (live) live stem is parasitised by aecium ForeignMinor Gymnosporangium clavariiforme European Hawthorn Rust, Tongues Of Fire Pucciniales: Pucciniaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Gymnosporangium clavariiforme/Gymnosporangium clavariiformeeuropean hawthorn rust, tongues of fireaecium Foodplant / parasiteForeign /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispearlivestemMinor (7-9+)aecium parasitises live stem
trunk trunk may be infected and damaged by basidiome Rare Chondrostereum purpureum Silverleaf Fungus, Silver Leaf Disease Agaricales: Cyphellaceae Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
 /Fungi/Basidiomycota/Agaricomycetes/Agaricales/Cyphellaceae/Chondrostereum purpureum/Chondrostereum purpureumsilverleaf fungus, silver leaf diseasebasidiome Foodplant / pathogen /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeartrunkRare basidiome infects and damages trunk
twig (dead) dead twig is decayed by long covered, but eventually erumpent through fissure pycnidium of Phomopsis coelomycetous anamorph UK/Ireland Diaporthe eres a pyrenomycete Diaporthales: Diaporthaceae Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia, Grove, W.B., 1935
 /Fungi/Ascomycota/Sordariomycetes/Diaporthales/Diaporthaceae/Diaporthe eres/Diaporthe eresa pyrenomycetelong covered, but eventually erumpent through fissurepycnidiumPhomopsis coelomycetous anamorph Foodplant / saprobeUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Rosales/Rosaceae/Pyrus communis/Pyrus communispeardeadtwig long covered, but eventually erumpent through fissure pycnidium of Phomopsis coelomycetous anamorph is saprobic on dead twig

Author & YearTitleSource
Benson, R.B., 1958Hymenoptera: 2. Symphyta. Section (c)Handbooks for the Identification of British Insects , Vol VI, Part 2(c), 252pp, The Royal Entomological Society of London
Buczacki, S. & Harris, K., 1998Pests, Diseases & Disorders of Garden PlantsCollins Photoguide, 2nd edition edition, Collins
Ellis, M.B. & J.P., 1997Microfungi on Land Plants: An Identification Handbook2nd (New Enlarged) edition, 868pp, The Richmond Publishing Co. Ltd
Grove, W.B., 1935British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidiaVol I, 488pp, Cambridge University Press
Kirk, P.M., 1997Mucor piriformis A. Fisch.I.M.I. Descriptions of Pathogenic Fungi and Bacteria CMI Descriptions of Pathenogenic Fungi and Bacteria Sheet 1309.
Kozakiewicz, Z., 1995Penicillium expansumI.M.I. Descriptions of Pathogenic Fungi and Bacteria CMI Descriptions of Pathenogenic Fungi and Bacteria Sheet 1258.
Laundon, G., 1977Gymnosporangium asiaticum Miyabe ex YamadaI.M.I. Descriptions of Pathogenic Fungi and Bacteria CMI Descriptions of Pathenogenic Fungi and Bacteria Sheet 541: 1.
Laundon, G., 1977Gymnosporangium clavariiforme (Pers.) DC.I.M.I. Descriptions of Pathogenic Fungi and Bacteria CMI Descriptions of Pathenogenic Fungi and Bacteria Sheet 542: 1-2.
Mound L.A., Morison, G.D., Pitkin, B.R. & Palmer, J.M., 1976ThysanopteraHandbooks for the Identification of British Insects, Vol 1, part 11, 79pp, The Royal Entomological Society of London
Southwood, T.R.E. & Leston, D., 1959Land and Water Bugs of the British IslesWayside & Woodland Series, 1959 edition, 436pp, Frederick Warne & Co. Ltd.

Pyrus communis (Pear) may also be included in 'fed on by' relations listed under the following higher taxa:

Taxonomic hierarchy:
SpeciesPyrus communis (Pear)
Species aggregatePyrus communis s.l. (pear)
GenusPyrus (pears)
FamilyROSACEAE (roses and fruit trees)
OrderROSALES (roses, elms, nettles, hops, buckthorns and figs)
SubclassEU-DICOTS (dicotyledonous flowering plants)
ClassMAGNOLIOPSIDA (flowering plants)
PhylumTRACHEOPHYTA (vascular plants)
KingdomPLANTAE (plants)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
NBNNBN (data.nbn.org.uk) has a distribution map for Pyrus communis (Pear)

Pyrus communis (Pear) may be included in identification literature listed under the following higher taxa:

Literature listed under the following higher taxa may be relevant to Pyrus communis (Pear):

BioImagesBioImages (www.bioimages.org.uk) has 16 images of Pyrus communis (Pear)
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