| 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 |
  |
|
Myzus ascalonicus |
Shallot Aphid |
Hemiptera: Aphididae |
Aphids Recorded on Cultivated Plants in Norway 1946-1962, Fjelddalen, J., 1964
|
/Animalia/Arthropoda/Insecta/Hemiptera/Aphididae/Myzus (Nectarosiphon) ascalonicus/ | Myzus (Nectarosiphon) ascalonicus | shallot aphid | | | | |
Foodplant / sap sucker | | Foreign |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | | | |
Indoors, in greenhouse, captivity, culture or experimentally induced | | sucks sap of |
|
|
has sap sucked by |
 |
|
Neotoxoptera formosana |
Onion Aphid |
Hemiptera: Aphididae |
CSL Pest Risk Analysis for Neotoxoptera formosana, MacLeod, A., 2007
|
/Animalia/Arthropoda/Insecta/Hemiptera/Aphididae/Neotoxoptera formosana/ | Neotoxoptera formosana | onion aphid | | | | |
Foodplant / sap sucker | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | | | Major |
| | sucks sap of |
|
|
is spotted by colony of Aspergillus dematiaceous anamorph |
|
|
Aspergillus niger |
Black Mould Of Onions, Garlic and Shallots - causative organism |
Eurotiales: Trichocomaceae |
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
|
/Fungi/Ascomycota/Eurotiomycetes/Eurotiales/Trichocomaceae/Aspergillus niger/ | Aspergillus niger | black mould of onions, garlic and shallots (causative organism) | | | colony | Aspergillus dematiaceous anamorph |
Foodplant / spot causer | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | | | |
| | colony of Aspergillus dematiaceous anamorph causes spots on |
|
|
may be infected and damaged by |
 |
 |
Armillaria |
honey fungi |
Agaricales: Physalacriaceae |
British Parasitic Fungi, Moore, W.C., 1959
|
/Fungi/Basidiomycota/Agaricomycetes/Agaricales/Physalacriaceae/Armillaria/ | Armillaria | honey fungi | | | | |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | | | |
| | infects and damages |
|
|
is parasitised by long covered by epidermis telium |
|
|
Puccinia porri |
Leek Rust, Allium Rust |
Pucciniales: Pucciniaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
Checklist of the British and Irish Basidiomycota, Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
|
/Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Puccinia porri/ | Puccinia porri | leek rust, allium rust | | long covered by epidermis | | telium |
Foodplant / parasite | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | | | |
| | long covered by epidermis telium parasitises |
|
|
is parasitised by uredium |
|
|
Puccinia porri |
Leek Rust, Allium Rust |
Pucciniales: Pucciniaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
Checklist of the British and Irish Basidiomycota, Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
|
/Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Pucciniaceae/Puccinia porri/ | Puccinia porri | leek rust, allium rust | | | | uredium |
Foodplant / parasite | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | | | |
| | uredium parasitises |
|
|
may be infected and damaged by |
|
|
Iris Yellow Spot virus |
IYSV |
|
Iris yellow spot virus of Lisianthus, Anon., 2007
|
/Iris Yellow Spot virus/ | Iris Yellow Spot virus | IYSV | | | | |
Foodplant / pathogen | | Foreign |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | | | Major |
| | infects and damages |
| bulb base (white mycelial-coated) |
|
white mycelial-coated bulb base may be infected and damaged by numerous sclerotium |
|
|
Stromatinia cepivora |
Onion White Rot - causative organism |
Helotiales: Sclerotiniaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Fungi of the South East England, Dennis, R.W.G., 1995
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
|
/Fungi/Ascomycota/Leotiomycetes/Helotiales/Sclerotiniaceae/Stromatinia cepivora/ | Stromatinia cepivora | onion white rot (causative organism) | | numerous | | sclerotium |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | white mycelial-coated | bulb base | | Major |
| | numerous sclerotium infects and damages white mycelial-coated bulb base |
| bulb scale (inner) |
|
bulb scale (inner) may be infected and damaged by |
|
|
Burkholderia gladioli pv. alliicola |
a plant pathogenic pseudomonad |
|
Burkholderia gladioli pv. alliicola, Saddler, G.S., 1994
|
/Proteobacteria/Betaproteobacteria/Burkholderia gladioli pv. alliicola/ | Burkholderia gladioli pv. alliicola | a plant pathogenic pseudomonad | | | | |
Foodplant / pathogen | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | bulb scale (inner) | | |
| | infects and damages bulb scale (inner) |
| bulb scale (outer) (dry) |
|
dry bulb scale (outer) is decayed by concentric acervulus of Colletotrichum coelomycetous anamorph |
|
|
Colletotrichum circinans |
Onion Smudge - causative organism, Onion Smudge Fungus |
Glomerellaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
British Parasitic Fungi, Moore, W.C., 1959
|
/Fungi/Ascomycota/Sordariomycetes/Glomerellaceae/Colletotrichum circinans/ | Colletotrichum circinans | onion smudge (causative organism), onion smudge fungus | | concentric | acervulus | Colletotrichum coelomycetous anamorph |
Foodplant / saprobe | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | dry | bulb scale (outer) | | Major |
| (8-9) | concentric acervulus of Colletotrichum coelomycetous anamorph is saprobic on dry bulb scale (outer) |
| bulb |
|
bulb may be infected and damaged by colony |
|
|
Erwinia carotovora |
Bacterial Soft Rot |
|
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Erwinia carotovora/ | Erwinia carotovora | bacterial soft rot | | | | colony |
Foodplant / pathogen | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | bulb | | |
| | colony infects and damages bulb |
| bulb |
|
bulb is foodplant of |
|
|
Aceria tulipae |
(Onion Mite, Dry Bulb Mite, Garlic Mite, Tulip Mite) |
Trombidiformes: Eriophyidae |
CSL Pest Risk Analysis for Aceria tulipae, MacLeod, A., 2007
|
/Animalia/Arthropoda/Arachnida/Trombidiformes/Eriophyidae/Aceria tulipae/ | Aceria tulipae | (onion mite, dry bulb mite, garlic mite, tulip mite) | | | | |
Foodplant / feeds on | | Foreign |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | bulb | | |
| | feeds on bulb |
| bulb (decaying) |
|
decaying bulb may contain larva |
|
|
Eumerus strigatus |
a lesser bulb-fly |
Diptera: Syrphidae |
Colour Guide to Hoverfly Larvae (Diptera, Syrphidae) in Britain and Europe, Rotheray, G.E., 1993
|
/Animalia/Arthropoda/Insecta/Diptera/Syrphidae/Eumerus strigatus/ | Eumerus strigatus | a lesser bulb-fly | | | | larva |
Foodplant / internal feeder | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | decaying | bulb | | |
| | larva feeds within decaying bulb |
| bulb (live) |
|
live bulb may contain larva |
|
|
Delia antiqua |
Onion Fly |
Diptera: Anthomyiidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Arthropoda/Insecta/Diptera/Anthomyiidae/Delia antiqua/ | Delia antiqua | onion fly | | | | larva |
Foodplant / internal feeder | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | bulb | | |
| | larva feeds within live bulb |
| bulb (live) |
|
live bulb may contain larva |
 |
|
Delia platura |
Bean Seed Fly |
Diptera: Anthomyiidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Arthropoda/Insecta/Diptera/Anthomyiidae/Delia platura/ | Delia platura | bean seed fly | | | | larva |
Foodplant / internal feeder | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | bulb | | Minor |
| | larva feeds within live bulb |
| bulb (live) |
|
live bulb may be infected and damaged by colony of sporangium |
|
|
Peronospora destructor |
Onion Downy Mildew |
Peronosporales: Peronosporaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
A Checklist of the Downy Mildews (Peronosporaceae) of the British Isles, Preece, T.F., 2002
|
/Chromista/Oomycota/Peronosporea/Peronosporales/Peronosporaceae/Peronospora destructor/ | Peronospora destructor | onion downy mildew | | | colony | sporangium |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | bulb | | Major |
| | colony of sporangium infects and damages live bulb |
| leaf (base) (live, insufficently ripened before lifting) |
|
live, insufficently ripened before lifting leaf (base) may be infected and damaged by colony of Botrytis dematiaceous anamorph |
|
|
Botrytis aclada |
Onion Neck Rot - causative organism |
Helotiales: Sclerotiniaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Fungi of the South East England, Dennis, R.W.G., 1995
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
British Parasitic Fungi, Moore, W.C., 1959
|
/Fungi/Ascomycota/Leotiomycetes/Helotiales/Sclerotiniaceae/Botrytis aclada/ | Botrytis aclada | onion neck rot (causative organism) | | | colony | Botrytis dematiaceous anamorph |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live, insufficently ripened before lifting | leaf (base) | | Major |
Indoors, in greenhouse, captivity, culture or experimentally induced | | colony of Botrytis dematiaceous anamorph infects and damages live, insufficently ripened before lifting leaf (base) |
| leaf (base) (live) |
|
live leaf (base) may be infected and damaged by colony of Botrytis dematiaceous anamorph |
|
|
Botrytis byssoidea |
a dematiaceous anamorphic fungus |
Helotiales: Sclerotiniaceae |
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
British Parasitic Fungi, Moore, W.C., 1959
|
/Fungi/Ascomycota/Leotiomycetes/Helotiales/Sclerotiniaceae/Botrytis byssoidea/ | Botrytis byssoidea | a dematiaceous anamorphic fungus | | | colony | Botrytis dematiaceous anamorph |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | leaf (base) | | |
| | colony of Botrytis dematiaceous anamorph infects and damages live leaf (base) |
| leaf (esp. towards tip) (live, white-flecked) |
|
live, white-flecked leaf (esp. towards tip) may be infected and damaged by colony of Botrytis dematiaceous anamorph |
|
|
Botryotinia squamosa |
Onion Leaf Rot - causative organism |
Helotiales: Sclerotiniaceae |
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/Leotiomycetes/Helotiales/Sclerotiniaceae/Botryotinia squamosa/ | Botryotinia squamosa | onion leaf rot - causative organism | | | colony | Botrytis dematiaceous anamorph |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live, white-flecked | leaf (esp. towards tip) | | Major |
| | colony of Botrytis dematiaceous anamorph infects and damages live, white-flecked leaf (esp. towards tip) |
| leaf base (shortly yellow streaked) |
|
shortly yellow streaked leaf base may be infected and damaged by |
|
|
Onion Yellow Dwarf virus |
a phytopathogenic virus |
|
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Onion Yellow Dwarf virus/ | Onion Yellow Dwarf virus | a phytopathogenic virus | | | | |
Foodplant / pathogen | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | shortly yellow streaked | leaf base | | Minor |
| | infects and damages shortly yellow streaked leaf base |
| leaf |
|
leaf is mined by larva |
|
|
Phytomyza gymnostoma |
Allium Leaf-miner |
Diptera: Agromyzidae |
Allium leaf miner, Anon., 2008
CSL Pest Risk Analysis for Pepino mosaic virus, Jones, D.R., 2005
|
/Animalia/Arthropoda/Insecta/Diptera/Agromyzidae/Phytomyza gymnostoma/ | Phytomyza gymnostoma | Allium leaf-miner | | | | larva |
Foodplant / miner | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | leaf | | Minor |
| | larva mines leaf |
| leaf |
|
leaf is foodplant of effuse colony of Cladosporium dematiaceous anamorph |
|
|
Cladosporium allii-cepae |
an ascomycete |
Capnodiales: Cladosporiaceae |
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
|
/Fungi/Ascomycota/Dothideomycetes/Capnodiales/Cladosporiaceae/Cladosporium allii-cepae/ | Cladosporium allii-cepae | an ascomycete | | effuse | colony | Cladosporium dematiaceous anamorph |
Foodplant / feeds on | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | leaf | | |
| | effuse colony of Cladosporium dematiaceous anamorph feeds on leaf |
| leaf (dead) |
|
dead leaf is decayed by mostly epiphyllous pycnidium of Ascochyta coelomycetous anamorph |
|
|
Ascochyta allii-cepae |
a coelomycete |
Pleosporales |
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
Ascochyta allii-cepae, Punithalingam, E., 1993
|
/Fungi/Ascomycota/Dothideomycetes/Pleosporales/Ascochyta allii-cepae/ | Ascochyta allii-cepae | a coelomycete | | mostly epiphyllous | pycnidium | Ascochyta coelomycetous anamorph |
Foodplant / saprobe | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | dead | leaf | | |
| | mostly epiphyllous pycnidium of Ascochyta coelomycetous anamorph is saprobic on dead leaf |
| leaf (live, shrivelled) |
|
live, shrivelled leaf may be infected and damaged by colony of sporangium |
|
|
Peronospora destructor |
Onion Downy Mildew |
Peronosporales: Peronosporaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
A Checklist of the Downy Mildews (Peronosporaceae) of the British Isles, Preece, T.F., 2002
|
/Chromista/Oomycota/Peronosporea/Peronosporales/Peronosporaceae/Peronospora destructor/ | Peronospora destructor | onion downy mildew | | | colony | sporangium |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live, shrivelled | leaf | | Major |
| | colony of sporangium infects and damages live, shrivelled leaf |
| leaf (live, swollen or twisted) |
|
live, swollen or twisted leaf is parasitised by elongated streaks or isolated pustules sorus |
|
|
Urocystis magica |
Onion Smut |
Urocystidales: Urocystidaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
Checklist of the British and Irish Basidiomycota, Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
|
/Fungi/Basidiomycota/Ustilaginomycetes/Urocystidales/Urocystidaceae/Urocystis magica/ | Urocystis magica | onion smut | | elongated streaks or isolated pustules | | sorus |
Foodplant / parasite | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live, swollen or twisted | leaf | | |
| (4-11) | elongated streaks or isolated pustules sorus parasitises live, swollen or twisted leaf |
| leaf (live, swollen, distorted) |
|
live, swollen, distorted leaf may be infected and damaged by |
|
|
Ditylenchus dipsaci |
Stem Eelworm, Stem and Bulb Eelworm |
Rhabditida: Anguinidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Nematoda/Secernentea/Rhabditida/Anguinidae/Ditylenchus dipsaci/ | Ditylenchus dipsaci | stem eelworm, stem and bulb eelworm | | | | |
Foodplant / pathogen | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live, swollen, distorted | leaf | | |
| | infects and damages live, swollen, distorted leaf |
| leaf (live) |
|
live leaf is spotted by |
|
|
Burkholderia gladioli pv. alliicola |
a plant pathogenic pseudomonad |
|
Burkholderia gladioli pv. alliicola, Saddler, G.S., 1994
|
/Proteobacteria/Betaproteobacteria/Burkholderia gladioli pv. alliicola/ | Burkholderia gladioli pv. alliicola | a plant pathogenic pseudomonad | | | | |
Foodplant / spot causer | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | leaf | | |
| | causes spots on live leaf |
| leaf (live) |
|
live leaf is grazed by caterpillar |
|
|
Mamestra brassicae |
Cabbage Moth |
Lepidoptera: Noctuidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Arthropoda/Insecta/Lepidoptera/Noctuidae/Mamestra brassicae/ | Mamestra brassicae | cabbage moth | | | | caterpillar |
Foodplant / open feeder | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | leaf | | |
| | caterpillar grazes on live leaf |
| leaf (live) |
|
live leaf may shelter hypophyllous egg |
|
|
Mamestra brassicae |
Cabbage Moth |
Lepidoptera: Noctuidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Arthropoda/Insecta/Lepidoptera/Noctuidae/Mamestra brassicae/ | Mamestra brassicae | cabbage moth | | hypophyllous | | egg |
Plant / resting place / under | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | leaf | | |
| | hypophyllous egg may be found under live leaf |
| leaf (live) |
|
live leaf may contain caterpillar |
|
|
Acrolepiopsis assectella |
Leek Moth |
Lepidoptera: Glyphipterigidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Arthropoda/Insecta/Lepidoptera/Glyphipterigidae/Acrolepiopsis assectella/ | Acrolepiopsis assectella | leek moth | | | | caterpillar |
Foodplant / internal feeder | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | leaf | | |
| | caterpillar feeds within live leaf |
| leaf (live) |
|
live leaf is foodplant of adult |
|
|
Thrips tabaci |
Onion Thrips |
Thysanoptera: Thripidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Thrips, Kirk, W.D.J., 1996
Thysanoptera, Mound L.A., Morison, G.D., Pitkin, B.R. & Palmer, J.M., 1976
|
/Animalia/Arthropoda/Insecta/Thysanoptera/Thripidae/Thrips tabaci/ | Thrips tabaci | onion thrips | | | | adult |
Foodplant / feeds on | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | leaf | | Major |
| | adult feeds on live leaf |
| leaf (live) |
|
live leaf is foodplant of larva |
|
|
Thrips tabaci |
Onion Thrips |
Thysanoptera: Thripidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Thrips, Kirk, W.D.J., 1996
Thysanoptera, Mound L.A., Morison, G.D., Pitkin, B.R. & Palmer, J.M., 1976
|
/Animalia/Arthropoda/Insecta/Thysanoptera/Thripidae/Thrips tabaci/ | Thrips tabaci | onion thrips | | | | larva |
Foodplant / feeds on | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | leaf | | Major |
| (1-12) | larva feeds on live leaf |
| leaf (live) |
|
live leaf is spotted by Alternaria dematiaceous anamorph |
|
|
Alternaria porri |
"Purple Blotch Disease" Of Alliums - causative organism |
Pleosporales: Pleosporaceae |
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
British Parasitic Fungi, Moore, W.C., 1959
|
/Fungi/Ascomycota/Dothideomycetes/Pleosporales/Pleosporaceae/Alternaria porri/ | Alternaria porri | "purple blotch disease" of Alliums (causative organism) | | | | Alternaria dematiaceous anamorph |
Foodplant / spot causer | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | leaf | | |
| | Alternaria dematiaceous anamorph causes spots on live leaf |
| leaf (otting) |
|
otting leaf may be infected and damaged by colony of Botrytis dematiaceous anamorph |
|
|
Botryotinia squamosa |
Onion Leaf Rot - causative organism |
Helotiales: Sclerotiniaceae |
British Parasitic Fungi, Moore, W.C., 1959
|
/Fungi/Ascomycota/Leotiomycetes/Helotiales/Sclerotiniaceae/Botryotinia squamosa/ | Botryotinia squamosa | onion leaf rot - causative organism | | | colony | Botrytis dematiaceous anamorph |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | otting | leaf | | |
| | colony of Botrytis dematiaceous anamorph infects and damages otting leaf |
| leaf (scorched or senescent) |
|
scorched or senescent leaf may be infected and damaged by mycelium |
|
|
Ascochyta allii-cepae |
a coelomycete |
Pleosporales |
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
Ascochyta allii-cepae, Punithalingam, E., 1993
|
/Fungi/Ascomycota/Dothideomycetes/Pleosporales/Ascochyta allii-cepae/ | Ascochyta allii-cepae | a coelomycete | | | | mycelium |
Foodplant / pathogen | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | scorched or senescent | leaf | | |
| | mycelium infects and damages scorched or senescent leaf |
| leaf (yellow, crinkled, flatened, twisted) |
|
yellow, crinkled, flatened, twisted leaf may be infected and damaged by |
|
|
Onion Yellow Dwarf virus |
a phytopathogenic virus |
|
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Onion Yellow Dwarf virus/ | Onion Yellow Dwarf virus | a phytopathogenic virus | | | | |
Foodplant / pathogen | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | yellow, crinkled, flatened, twisted | leaf | | Minor |
| | infects and damages yellow, crinkled, flatened, twisted leaf |
| leaf (yellowed, wilting, died back) |
|
yellowed, wilting, died back leaf may be infected and damaged by |
|
|
Stromatinia cepivora |
Onion White Rot - causative organism |
Helotiales: Sclerotiniaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Fungi of the South East England, Dennis, R.W.G., 1995
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
|
/Fungi/Ascomycota/Leotiomycetes/Helotiales/Sclerotiniaceae/Stromatinia cepivora/ | Stromatinia cepivora | onion white rot (causative organism) | | | | |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | yellowed, wilting, died back | leaf | | Major |
| | infects and damages yellowed, wilting, died back leaf |
| root |
|
root may be infected and damaged by usually solitary, immersed, then erumpent pycnidium of phoma anamorph |
|
|
Pyrenochaeta terrestris |
Pink Root Of Onion - causative organism |
|
Pyrenochaeta terrestris, Punithalingam, E. & Holliday, P., 1998
|
/Fungi/Ascomycota/Pyrenochaeta terrestris/ | Pyrenochaeta terrestris | pink root of onion (causative organism) | | usually solitary, immersed, then erumpent | pycnidium | phoma anamorph |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | root | | Major |
| | usually solitary, immersed, then erumpent pycnidium of phoma anamorph infects and damages root |
| root (white mycelial-coated) |
|
white mycelial-coated root may be infected and damaged by numerous sclerotium |
|
|
Stromatinia cepivora |
Onion White Rot - causative organism |
Helotiales: Sclerotiniaceae |
Fungi of the South East England, Dennis, R.W.G., 1995
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
|
/Fungi/Ascomycota/Leotiomycetes/Helotiales/Sclerotiniaceae/Stromatinia cepivora/ | Stromatinia cepivora | onion white rot (causative organism) | | numerous | | sclerotium |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | white mycelial-coated | root | | Major |
| | numerous sclerotium infects and damages white mycelial-coated root |
| scale (live) |
|
live scale of bulb may be infected and damaged by |
|
|
Burkholderia cepacia |
a plant pathogenic pseudomonad |
|
Burkholderia cepacia, Saddler, G.S., 1994
|
/Proteobacteria/Betaproteobacteria/Burkholderia cepacia/ | Burkholderia cepacia | a plant pathogenic pseudomonad | | | | |
Foodplant / pathogen | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | scale | bulb | |
| | infects and damages live scale of bulb |
| scape |
|
scape is foodplant of effuse colony of Cladosporium dematiaceous anamorph |
|
|
Cladosporium allii-cepae |
an ascomycete |
Capnodiales: Cladosporiaceae |
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
|
/Fungi/Ascomycota/Dothideomycetes/Capnodiales/Cladosporiaceae/Cladosporium allii-cepae/ | Cladosporium allii-cepae | an ascomycete | | effuse | colony | Cladosporium dematiaceous anamorph |
Foodplant / feeds on | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | | scape | | |
| | effuse colony of Cladosporium dematiaceous anamorph feeds on scape |
| stem (live, twisted) |
|
live, twisted stem may be infected and damaged by colony of sporangium |
|
|
Peronospora destructor |
Onion Downy Mildew |
Peronosporales: Peronosporaceae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
A Checklist of the Downy Mildews (Peronosporaceae) of the British Isles, Preece, T.F., 2002
|
/Chromista/Oomycota/Peronosporea/Peronosporales/Peronosporaceae/Peronospora destructor/ | Peronospora destructor | onion downy mildew | | | colony | sporangium |
Foodplant / pathogen | | UK and/or Eire |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live, twisted | stem | | Major |
| | colony of sporangium infects and damages live, twisted stem |
| stem (live) |
|
live stem may contain larva |
|
|
Delia antiqua |
Onion Fly |
Diptera: Anthomyiidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Arthropoda/Insecta/Diptera/Anthomyiidae/Delia antiqua/ | Delia antiqua | onion fly | | | | larva |
Foodplant / internal feeder | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | stem | | |
| | larva feeds within live stem |
| stem (live) |
|
live stem may contain larva |
|
|
Delia platura |
Bean Seed Fly |
Diptera: Anthomyiidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Arthropoda/Insecta/Diptera/Anthomyiidae/Delia platura/ | Delia platura | bean seed fly | | | | larva |
Foodplant / internal feeder | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | stem | | Minor |
| | larva feeds within live stem |
| stem (live) |
|
live stem may contain caterpillar |
|
|
Acrolepiopsis assectella |
Leek Moth |
Lepidoptera: Glyphipterigidae |
Pests, Diseases & Disorders of Garden Plants, Buczacki, S. & Harris, K., 1998
|
/Animalia/Arthropoda/Insecta/Lepidoptera/Glyphipterigidae/Acrolepiopsis assectella/ | Acrolepiopsis assectella | leek moth | | | | caterpillar |
Foodplant / internal feeder | | |
/Plantae/Tracheophyta/Magnoliopsida/Asparagales/Amaryllidaceae/Allium cepa/ | Allium cepa | onion | | live | stem | | |
| | caterpillar feeds within live stem |
NBN (data.nbn.org.uk)
has a distribution map for Allium cepa (Onion)
