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Cocconia spurcaria

Scientific Name
Cocconia spurcaria
Scientific Author
(Berk. & Broome) Arx
Taxonomy
(Ascomycota: Dothideomycetes: Parmulariaceae)
Pest Status
2 NZ - Regulated pest
Status
0 NZ - Unknown
Reliability
High
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Diagnostic Images

In Life
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Caption
Black stromatic fruitbodies of Cocconia spurcaria on under surface of leaves of breadfruit
Source
E. McKenzie Landcare Research
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Diagnostic Images (3)
Diagnostic Notes
Disease

Black leaf fleck. Numerous circular, black cuticular spots 1–2 mm diam., more commonly on upper surface of recently fallen leaves.

Morphology

Ascomata superficial, black, stromatic, orbicular to irregular, 1–2 mm diam., crust-like and rising above surface of leaf. Asci subglobose to clavate, 50–80 × 25–40 µm, 8-spored. Ascospores in overlapping rows, 24–30 × 11–15 µm, 1-septate, septum slightly towards apex, smooth-walled, hyaline when immature, becoming brown at maturity, straight, subcylindrical, slightly constricted in middle, rounded at each end.

Notes

The ascocarps of Cocconia spurcaria are often parasitized by another ascomycete fungus, Didymosphaeria cocconiae. The latter has narrower asci (55–75 × 13–19 µm) and roughened, narrower ascospores (18–24 × 7–8.5 µm).

More Information
Specimen Contact
Eric McKenzie
Author
McKenzie, E.
Created
12/07/2013 09:56 AEST
Last Updated
20/03/2014 22:23 AEST
Citation
McKenzie, E. (2013) Cocconia spurcaria (Cocconia spurcaria) Updated on 3/20/2014 10:23:10 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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