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Cercospora lactucae-sativae

Scientific Name
Cercospora lactucae-sativae
Scientific Author
Sawada
Taxonomy
(Ascomycota: Dothideomycetes: Capnodiales: Mycosphaerellaceae)
Pest Status
2 NZ - Regulated pest
Status
0 NZ - Unknown
Reliability
High
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Diagnostic Images

Conidiophores & Conidia
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Caption
Cercospora longissima conidiophores and conidia
Source
E. McKenzie Landcare Research
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Diagnostic Images (5)
Diagnostic Notes
Disease

Leaf spots circular or oval, up to 1 cm diam, sometimes coalescing to cover large areas of the leaf, grey or light brown with a small (0.5–1 mm) whitish centre.

Morphology

Conidiophores single or in fascicles of 2–10, pale olivaceous brown, 25–90 × 4–6 µm, on both leaf surfaces. Conidiophores usually continue to elongate, producing successive conidia, and hence 2 or more scars. Conidia 20–220 × 3.5–5 µm, hyaline, 10–20-septate, smooth, obclavate, straight or slightly curved, tip rounded, basal cell truncate with distinct scar.

Note This fungus is considered by Crous & Braun (2003) to be close to Cercospora apii sensu lato.
More Information
Specimen Contact
Eric McKenzie
Author
McKenzie, E.
Created
11/07/2013 01:46 AEST
Last Updated
20/03/2014 19:39 AEST
Citation
McKenzie, E. (2013) Cercospora lactucae-sativae (Cercospora lactucae-sativae) Updated on 3/20/2014 7:39:43 PM 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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