BioInfo (UK)

Pyrus L. (pears)

BioImages BioImages (www.bioimages.org.uk) has 16 images of Pyrus (pears)

NBN NBN (data.nbn.org.uk) has the UK distribution map of Pyrus (pears)

Subtaxa (ie subgroups of this Genus)

Taxon Rank #refs #webs

Suggested Literature

Pyrus may be covered by literature listed under:

BIOTA
(living things)
Eukaryota
(eukaryotes)
PLANTAE
(plants)
TRACHEOPHYTA
(vascular plants)
MAGNOLIOPSIDA
(flowering plants)
Broadleaved trees Trees Broadleaved trees and shrubs Trees and shrubs Trees, shrubs, woody and climbing plants (via Broadleaved trees)

Feeding and other inter-species relationships

Associated with Pyrus:

(dead) dead is decayed by not crowded, pustular to subdepressed, covered, then disc erumpent, dingy then blackish stroma of Cytospora coelomycetous anamorph Cytospora rubescens f. crataegi - a stromatic coelomycete (Diaporthales: Valsaceae) UK/Ireland Grove, W.B., 1935 [spore tendrils deep red.]
has sap sucked by Eulecanium excrescens - Wisteria Scale (Hemiptera: Coccidae) Foreign MacLeod, A. & Matthews, L., 2005
is associate of Magdalis (Porrothus) cerasi - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
bark (cankered) cankered bark may be infected and damaged by erumpent, clustered apothecium Pezicula corticola - a discomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
bark (cankered) cankered bark may be infected and damaged by conidioma of Cryptosporiopsis coelomycetous anamorph Pezicula corticola - a discomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (cankered) cankered branch may be infected and damaged by Nectria galligena - Apple and Pear Canker (Hypocreales: Nectriaceae) Buczacki, S. & Harris, K., 1998
branch (dead, corticate) dead, corticate branch is decayed by erumpent stroma Hypoxylon multiforme - Birch Woodwart (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead, decorticate, attached) dead, decorticate, attached branch is decayed by fruitbody Vuilleminia cystidiata - a resupinate basidiomycete (Polyporales: Corticiaceae) Foreign Morris, I. & Roberts, P., 1997
branch (dead, decorticate) dead, decorticate branch is decayed by effuse stroma Hypoxylon multiforme - Birch Woodwart (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by erumpent stroma Potebniamyces pyri - a discomycete (Leotiales: Bulgariaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by conidioma of Phacidiopsis anamorph Potebniamyces pyri - a discomycete (Leotiales: Bulgariaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by immersed, stromatic, solitary or in small groups perithecium Potebniamyces pyri - a discomycete (Leotiales: Bulgariaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Nodulisporium anamorph Hypoxylon multiforme - Birch Woodwart (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (live, decorticate) live, decorticate branch is decayed by fruitbody Vuilleminia cystidiata - a resupinate basidiomycete (Polyporales: Corticiaceae) Foreign Morris, I. & Roberts, P., 1997
branch (live) live branch is decayed by densely encrusting Lepidosaphes ulmi - Mussel Scale (Hemiptera: Coccidae) Buczacki, S. & Harris, K., 1998
branch (old) (thickly encrusted) thickly encrusted branch (old) has sap sucked by Pseudaulacaspis pentagona - White Peach Scale (Hemiptera: Diaspididae) Foreign MacLeod, A., 2007
branch branch is decayed by subgregarious to densely scattered, covered then erumpent, blackish grey with paler roundish flat disc stroma of Cytospora coelomycetous anamorph Valsa ambiens - a valsoid pyrenomycete (Diaporthales: Valsaceae) UK/Ireland Grove, W.B., 1935
bud (vegetative) bud (vegetative) may contain larva Temnocerus longiceps - a leafroller weevil (Coleoptera: Rhynchitidae) Morris, M.G., 1990
bud scale (live) live bud scale may be infected and damaged by colony of Fusicladium dematiaceous anamorph Venturia pyrina - Pear Scab - causative organism (Pseudosphaeriales: Venturiaceae) Buczacki, S. & Harris, K., 1998,
Ellis, M.B. & J.P., 1997 ["Pear Scab"]
cambium of dead twig (below) below cambium of dead twig is mined by larva Magdalis (Panus) barbicornis - Pear Weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002
cambium cambium may contain larva Scolytus mali - Large Fruit Bark Beetle (Coleoptera: Curculionidae) Bullock, J.A., 1992
cambium cambium may contain larva Scolytus rugulosus - Fruit Bark Beetle, Shothole Borer (Small Fruit Bark Beetle) (Coleoptera: Curculionidae) Bullock, J.A., 1992
flower (live) live flower may be infected and damaged by colony of Fusicladium dematiaceous anamorph Venturia pyrina - Pear Scab - causative organism (Pseudosphaeriales: Venturiaceae) Ellis, M.B. & J.P., 1997 ["Pear Scab"]
fruit (live, distorted) live, distorted fruit may be infected and damaged by colony of Fusicladium dematiaceous anamorph Venturia pyrina - Pear Scab - causative organism (Pseudosphaeriales: Venturiaceae) Buczacki, S. & Harris, K., 1998 [causes dark brown, velvety blotches],
Ellis, M.B. & J.P., 1997 ["Pear Scab"]
fruit (young, swollen, prematurely falling) young, swollen, prematurely falling fruit is galled by communal larva Contarinia pyrivora - Pear Midge (Diptera: Cecidomyiidae) Buczacki, S. & Harris, K., 1998,
Stubbs, F.B. (Editor), 1986
fruit (young) (blackened, distorted, prematurely falling) blackened, distorted, prematurely falling fruit (young) may contain communal larva Contarinia pyrivora - Pear Midge (Diptera: Cecidomyiidae) Buczacki, S. & Harris, K., 1998,
Stubbs, F.B. (Editor), 1986
leaf (dead, fallen, overwintered, rotting) dead, fallen, overwintered, rotting leaf is decayed by immersed pseudothecium Venturia pyrina - Pear Scab - causative organism (Pseudosphaeriales: Venturiaceae) Ellis, M.B. & J.P., 1997 ["Pear Scab"]
leaf (live, blistered) live, blistered leaf is galled by infection Taphrina bullata - a tongue fungus (Taphrinales: Taphrinaceae) Buczacki, S. & Harris, K., 1998 [causes small brown leaf blisters],
Ellis, M.B. & J.P., 1997 [causes blister-like spots]
leaf (live) live leaf is galled by Eriophyes pyri - Pear Leaf Bister Mite (Trombidiformes: Eriophyidae) Major Buczacki, S. & Harris, K., 1998 [irregular pink or yellow blisters in Spring, turning dark brown to black as season progresses],
Stubbs, F.B. (Editor), 1986
leaf (live) live leaf is galled by larva Dasineura pyri - a gall midge (Diptera: Cecidomyiidae) Stubbs, F.B. (Editor), 1986
leaf (live) live leaf is galled by mostly hypophyllous aecium Gymnosporangium asiaticum - Japanese Pear Rust (Pucciniales: Pucciniaceae) Foreign Laundon, G., 1977a [causes thickened brown spot on leaf]
leaf (live) live leaf is galled by hypophyllous aecium Gymnosporangium sabinae - European Pear Rust (Pucciniales: Pucciniaceae) Restricted Laundon, G., 1977b
leaf (live) live leaf is parasitised by epiphyllous pycnium Gymnosporangium asiaticum - Japanese Pear Rust (Pucciniales: Pucciniaceae) Foreign Laundon, G., 1977a
leaf (live) live leaf is parasitised by epiphyllous pycnium Gymnosporangium sabinae - European Pear Rust (Pucciniales: Pucciniaceae) Restricted Laundon, G., 1977b
leaf (live) live leaf may be infected and damaged by colony of Fusicladium dematiaceous anamorph Venturia pyrina - Pear Scab - causative organism (Pseudosphaeriales: Venturiaceae) Buczacki, S. & Harris, K., 1998 [causes dark brown, velvety blotches],
Ellis, M.B. & J.P., 1997 ["Pear Scab"]
leaf (live) live leaf is rolled by larva Dasineura pyri - a gall midge (Diptera: Cecidomyiidae) Buczacki, S. & Harris, K., 1998
leaf (live) live leaf is spotted by epiphyllous, immersed pycnidium of Phoma coelomycetous anamorph Mycosphaerella pomi - an ascomycete (Capnodiales: Mycosphaerellaceae) Ellis, M.B. & J.P., 1997 [causing ochraceous or greyish-brown spots 2-6mm diam, with dark brown borders]
leaf (live) live leaf is spotted by pycnidium of Phoma coelomycetous anamorph Phoma prunicola - Apple and Pear Leaf Spot (Pleosporales) Morgan-Jones, G., 1967
leaf leaf is grazed by epiphyllous larva Caliroa cerasi - Pear and Cherry Slug Sawfly (Hymenoptera: Tenthredinidae) Major Buczacki, S. & Harris, K., 1998,
Benson, R.B., 1952 [skeletonises the leaf, leaving one cuticle intact]
leaf leaf is grazed by larva Cladius (Priophorus) pallipes - a sawfly (Hymenoptera: Tenthredinidae) Benson, R.B., 1958
root (dead) dead root is decayed by fruitbody Grifola frondosa - Hen Of The Woods (Polyporales: Meripilaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [weakly parasitic then saprobic]
root (live) live root is parasitised by fruitbody Grifola frondosa - Hen Of The Woods (Polyporales: Meripilaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [weakly parasitic then saprobic]
shoot (decaying) decaying shoot may contain larva Involvulus caeruleus - Apple Twig Cutter, Twig Cutting Weevil, Twig-cutting Weevil (Coleoptera: Rhynchitidae) Morris, M.G., 1990
stem (woody) (live) live stem (woody) is decayed by densely encrusting Lepidosaphes ulmi - Mussel Scale (Hemiptera: Coccidae) Buczacki, S. & Harris, K., 1998
trunk (thickly encrusted) thickly encrusted trunk has sap sucked by Pseudaulacaspis pentagona - White Peach Scale (Hemiptera: Diaspididae) Foreign MacLeod, A., 2007
trunk (wounded) wounded trunk is parasitised by fruitbody Polyporus squamosus - Dryad’S Saddle (Polyporales: Polyporaceae) Buczacki, S. & Harris, K., 1998 [causes a white and stringy rot of the heart wood]
twig twig is decayed by subgregarious to densely scattered, covered then erumpent, blackish grey with paler roundish flat disc stroma of Cytospora coelomycetous anamorph Valsa ambiens - a valsoid pyrenomycete (Diaporthales: Valsaceae) UK/Ireland Grove, W.B., 1935
wood wood is decayed by immersed, often loosely grouped perithecium Diaporthe eres - a pyrenomycete (Diaporthales: Diaporthaceae) Ellis, M.B. & J.P., 1997 [immersed in wood with necks emerging through the bark]

Pyrus may be associated with more taxa listed at higher taxonomic level

PLANTAE
(plants)
TRACHEOPHYTA
(vascular plants)
MAGNOLIOPSIDA
(flowering plants)
EU-DICOTS
(dicotyledonous flowering plants)
ROSACEAE
(roses and fruit trees)
Broadleaved trees Trees Broadleaved trees and shrubs Trees and shrubs Trees, shrubs, woody and climbing plants (via Broadleaved trees) Broadleaved trees, shrubs and climbers (via Broadleaved trees and shrubs)

References

Benson, R.B., 1952 Hymenoptera: 2. Symphyta. Section (b)
Benson, R.B., 1958 Hymenoptera: 2. Symphyta. Section (c)
Buczacki, S. & Harris, K., 1998 Pests, Diseases & Disorders of Garden Plants
Bullock, J.A., 1992 Host Plants of British Beetles: A List of Recorded Associations
Ellis, M.B. & J.P., 1997 Microfungi on Land Plants: An Identification Handbook
Grove, W.B., 1935 British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia
Laundon, G., 1977 Gymnosporangium asiaticum Miyabe ex Yamada
Laundon, G., 1977 Gymnosporangium fuscum DC.
Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 Checklist of the British and Irish Basidiomycota
MacLeod, A. & Matthews, L., 2005 CSL Pest Risk Analysis for Eulecanium excrescens
MacLeod, A., 2007 CSL Pest Risk Analysis for Pseudaulacaspis pentagona
Morgan-Jones, G., 1967 Phoma prunicola (Opiz) Wollenw. & Hochapf.
Morris, I. & Roberts, P., 1997 British Vuilleminia species
Morris, M.G., 1990 Orthocerous Weevils
Morris, M.G., 2002 True Weevils (Part I): Family Curculionidae, subfamilies Raymondionyminae to Smicronychinae
Stubbs, F.B. (Editor), 1986 Provisional Keys to British Plant Galls
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