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Passalora arachidicola

Scientific Name
Passalora arachidicola
Scientific Author
(Hori) U. Braun
Taxonomy
(Ascomycota: Dothideomycetes: Capnodiales: Mycosphaerellaceae)
Pest Status
1 NZ - Non-regulated species
Status
0 NZ - Unknown
Reliability
High
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Diagnostic Images

In Life
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Caption
Lower surface of a peanut leaflet with brown lesions of early leaf spot (Passalora arachidicola) and black lesions of late leaf spot (Passalora personata)
Source
E. McKenzie Landcare Research
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Diagnostic Images (3)
Diagnostic Notes
Disease

Early leaf spot. Lesions subcircular, 1–10 mm diam., reddish brown on upper surface, often surrounded by a chlorotic halo which is more distinct on upper surface; spot distinctly brown on lower surface. Petioles and stems may be infected, and plants may defoliate.

Morphology

Conidiophores mostly epiphyllous, 15–50 µm long, 3–6 µm thick, fasciculate, unbranched, 0–2-septate, pale golden brown, straight or flexuous, with thickened spore scars. Conidia 35–110 × 4–5 µm, 1–12-septate, sometimes slightly constricted at septa, pale olivaceous, smooth, straight or curved, obclavate, apex subacute, basal cell tapered to the base, thickened spore scar at base.

Notes

Macroscopically early leaf spot differs from late leaf spot (Passalora personata) principally by the presence of a halo, and the spots are not as dark as those caused by late leaf spot.

More Information
Specimen Contact
Eric McKenzie
Author
McKenzie, E.
Created
16/07/2013 11:48 AEST
Last Updated
16/04/2014 22:16 AEST
Citation
McKenzie, E. (2013) Passalora arachidicola (Passalora arachidicola) Updated on 4/16/2014 10:16:23 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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