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Yam Scale

Scientific Name
Aspidiella hartii
Scientific Author
(Cockerell, 1895)
Taxonomy
(Hemiptera: Diaspididae)
Pest Status
0 Unknown
Status
NZ - Exotic
Reliability
High
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Diagnostic Images

Dorsal - Adult
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Caption
HEM85 - Slide mounted
Source
Caroline Harding MAF
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Diagnostic Images (6)
Diagnostic Notes
Adult Female

Pyriform to elongate-pyriform, membranous. Pygidial margin without any paraphyses; only two pairs of rounded lobes present; plates present on margin lateral to where third lobes would be; median lobes with basal scleroses poorly developed and parallel; pygidial margin weakly crenulate.

Field Characters

In life, scale cover of adult female circular, brown to brownish-grey with slightly paler, approximately central exuviae; a circular white ventral scale is produced, which shows conspicuously on the host if the dorsal scale cover is removed. Scale cover of male smaller and more elongate than that of female. Exposed body of adult female creamy white or very pale yellow.

References

- Watson, G.W. (2002). Arthropods of Economic Importance: Diaspididae of the World. World Biodiversity Database, CD-ROM. Expert Center for Taxonomic Identification (ETI), University of Amsterdam, The Netherlands.
More Information
Specimen Contact
MAF Plant Health & Environment Laboratory
Author
MAF Plant Health & Environment Laboratory
Created
28/06/2011 10:46 AEST
Last Updated
19/03/2014 20:35 AEST
Citation
MAF Plant Health & Environment Laboratory (2011) Yam Scale (Aspidiella hartii) Updated on 3/19/2014 8:35:43 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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