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Alternaria porri

Scientific Name
Alternaria porri
Scientific Author
(Ellis) Cif.
Taxonomy
(Ascomycota: Dothideomycetes: Pleosporales: Pleosporaceae)
Pest Status
1 NZ - Non-regulated species
Status
NZ - Exotic
Reliability
High
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Diagnostic Images (5)
Diagnostic Notes
Disease

Purple blotch. Initial small, white leaf lesions developing into elliptical, purplish spots up to several cm long. Black fungal sporulation often visible within spot. Also causes leaf tip dieback.

Morphology

Conidiophores arising singly or in small groups, pale to mid brown, up to 120 µm long, 5–10 µm thick, with one or more distinct conidial scars. Conidia single, straight or slightly curved, obclavate or with body of conidium ellipsoidal and tapering to a beak, overall length 100–300 µm, 15–20 µm wide, pale, smooth or minutely verruculose, 8–12 transverse septa, 0–7 longitudinal or oblique septa, sometimes slightly constricted at septa, basal scar not very obvious; beak is often about same length as body of conidium, sometimes branched, pale coloured, 2–4 µm thick, tapering.

More Information
Specimen Contact
Eric McKenzie
Author
McKenzie, E.
Created
11/07/2013 09:18 AEST
Last Updated
07/05/2014 03:35 AEST
Citation
McKenzie, E. (2013) Alternaria porri (Alternaria porri) Updated on 5/7/2014 3:35:53 AM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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