BioImages: The Virtual Field-Guide (UK)
Allium cepa L. (Onion)
Suggested Literature
Allium cepa may be covered by literature listed under:
|
BIOTA (living things) |
Eukaryota (eukaryotes) |
PLANTAE (plants) |
SPERMATOPHYTA (vascular plants) |
MAGNOLIOPSIDA (flowering plants) |
LILIIDAE (monocotyledonous flowering plants) |
Feeding and other inter-species relationships
Associated with Allium cepa:
| is parasitised by uredium | Puccinia allii - a rust fungus (Uredinales: Pucciniaceae) | Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 Ellis, M.B. & J.P., 1997 |
|||
| is parasitised by long covered by epidermis telium | Puccinia allii - a rust fungus (Uredinales: Pucciniaceae) | Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 Ellis, M.B. & J.P., 1997 |
|||
| is spotted by colony of Aspergillus dematiaceous anamorph | Aspergillus niger - a dematiaceous anamorphic fungus (Eurotiales: Trichocomaceae) | Ellis, M.B. & J.P., 1997 [causes black mould of garlic and shallots] | |||
| bulb (decaying) | decaying bulb may contain larva | Eumerus strigatus - a lesser bulb-fly (Diptera: Syrphidae) | Rotheray, G.E., 1993 | ||
| bulb base (white mycelial-coated) | white mycelial-coated bulb base may be infected and damaged by numerous sclerotium | Sclerotium cepivorum - a fungus (Agaricales: Typhulaceae) | Ellis, M.B. & J.P., 1997 [Leaves wilt and turn yellow. "Onion White Rot".] | ||
| bulb scale (outer) (dry) | dry bulb scale (outer) is decayed by concentric acervulus of Colletotrichum coelomycetous anamorph | Colletotrichum circinans - a coelomycete (Phyllachorales: Phyllachoraceae) | Ellis, M.B. & J.P., 1997 | ||
| leaf (base) (live) | live leaf (base) may be infected and damaged by colony of Botrytis dematiaceous anamorph | Botrytis aclada - a dematiaceous anamorphic fungus (Helotiales: Sclerotiniaceae) | Ellis, M.B. & J.P., 1997 [causes Neck Rot of Onions and Shallots in storage] | ||
| 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) | Ellis, M.B. & J.P., 1997 [causes Mycelial Neck Rot of Onions] | ||
| leaf (live) | live leaf is parasitised by elongated streaks or isolated pustules sorus | Urocystis magica - a smut fungus (Urocystales: Urocystaceae) | 
|
Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 Ellis, M.B. & J.P., 1997 |
|
| leaf (live) | live leaf may be infected and damaged by mostly epiphyllous pycnidium of Ascochyta coelomycetous anamorph | Ascochyta allii-cepae - a coelomycete | Ellis, M.B. & J.P., 1997 [causes elliptical, whitish lesions with vinaceous brown borders, followed by die back] | ||
| leaf (live) | live leaf may be infected and damaged by colony of Botrytis dematiaceous anamorph | Botryotinia squamosa - an ascomycete fungus (Helotiales: Sclerotiniaceae) | Ellis, M.B. & J.P., 1997 [causes Tip and Leaf Blight of Onion.] | ||
| leaf (live) | live leaf is spotted by Alternaria dematiaceous anamorph | Alternaria porri - a dematiaceous hyphomycete (Pleosporales: Pleosporaceae) | Ellis, M.B. & J.P., 1997 [causes large, elliptical leaf spots of some shade of purple, sometimes with a broad, pale brown or pale yellow border. "Purple Blotch disease"] | ||
| leaf (shrivelling) | shrivelling leaf may be infected and damaged by colony | Peronospora destructor - a downy mildew (Peronosporales: Peronosporaceae) | Ellis, M.B. & J.P., 1997 [causing long pale-yellow lesions] | ||
| leaf | leaf is foodplant of effuse colony of Cladosporium dematiaceous anamorph | Mycosphaerella allii-cepae - an ascomycete (Mycosphaerellales: Mycosphaerellaceae) | Ellis, M.B. & J.P., 1997 | ||
| root (white mycelial-coated) | white mycelial-coated root may be infected and damaged by numerous sclerotium | Sclerotium cepivorum - a fungus (Agaricales: Typhulaceae) | Ellis, M.B. & J.P., 1997 [Leaves wilt and turn yellow. "Onion White Rot".] | ||
| scape | scape is foodplant of effuse colony of Cladosporium dematiaceous anamorph | Mycosphaerella allii-cepae - an ascomycete (Mycosphaerellales: Mycosphaerellaceae) | Ellis, M.B. & J.P., 1997 | ||
| stem (twisting) | twisting stem may be infected and damaged by colony | Peronospora destructor - a downy mildew (Peronosporales: Peronosporaceae) | Ellis, M.B. & J.P., 1997 [causing long pale-yellow lesions] |
Allium cepa may be associated with more taxa listed at higher taxonomic level
|
MAGNOLIOPSIDA (flowering plants) |
LILIIDAE (monocotyledonous flowering plants) |
Allium (leeks, onions, garlics) |
References
| Ellis, M.B. & J.P., 1997 | Microfungi on Land Plants: An Identification Handbook |
| Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 | Checklist of the British and Irish Basidiomycota |
| Rotheray, G.E., 1993 | Colour Guide to Hoverfly Larvae (Diptera, Syrphidae) in Britain and Europe |
