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Guignardia mangiferae

Scientific Name
Guignardia mangiferae
Scientific Author
A.J. Roy
Taxonomy
(Ascomycota: Dothideomycetes: Botryosphaeriales: Botryosphaeriaceae)
Pest Status
2 NZ - Regulated pest
Status
NZ - Exotic
Reliability
High
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Diagnostic Images

In Life
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Caption
Guignardia mangiferae symptoms on mango leaves
Source
E. McKenzie Landcare Research
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Diagnostic Images (5)
Diagnostic Notes
Disease

Leaf spots on seedling plants, circular or irregular, up to 5 mm diam., grey with a dark brown or black border. Only pycnidia are present in the leaf spots, the ascomata occur on dead leaves.

Morphology

Fruitbodies (pycnidia) immersed on upper surface of leaf. Ascomata immersed on lower surface of dead leaves. Asci cylindrical or clavate, 8-spored, 50–65 × 12–13 µm. Ascospores 10–15 × 5–7 µm, overlapping in 2–3 rows in ascus, hyaline, obovate, straight, aseptate. Pycnidia contain conidia. Conidia 8–12 × 5.5–7 µm, hyaline, obovoid or ellipsoidal, apex broadly rounded and indented, aseptate, surrounded by a mucilaginous layer, with an apical mucilaginous appendage 5–12 µm long.

More Information
Specimen Contact
Eric McKenzie
Author
McKenzie, E.
Created
15/07/2013 11:51 AEST
Last Updated
08/04/2014 20:55 AEST
Citation
McKenzie, E. (2013) Guignardia mangiferae (Guignardia mangiferae) Updated on 4/8/2014 8:55:01 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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