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Citrus blackfly

Scientific Name
Aleurocanthus woglumi
Scientific Author
Ashby, 1915
Taxonomy
(Hemiptera: Aleyrodidae: Aleyrodinae)

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Diagnostic Images

Dorsal view - female
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Caption
Dominica: Castle Bruce, 3 July 2001. Lolpez / Dominique det. J. Martin
Source
Ken Walker Museum Victoria
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Diagnostic Images (9)
Other Images (8)
Diagnostic Notes

Description: (Important characters in italics) Pupal case less than 1.65 x as long as broad; disc or submargin with a pattern of stout, acute or tubiforms spines; dorsal spines acute; cuticle brown; venter smooth; margin very coarsely toothed, submarginal row of spines normally 11 pairs in female usually with a single outer subdorsal apir arising adjacent to third posterior most submarginal pair.

Source: Martin, J. 1987 An identification guide to common whitefly pests of the world. (See reference for full details).

The six-legged, dusky, elongate first-instar larvae (0.3 x 0.15 mm) have two long and several shorter, slender dorsal glandular spines. All subsequent immature stages are sessile, have non-functional leg stubs and possess numerous, dark dorsal spines on which a stack of exuviae of earlier instars may occur. The second instar (0.4 x 0.2 mm) is a dark brown to charcoal convex disc with yellow markings, while the third instar (0.87 x 0.74 mm) is usually black with a rounded, greenish spot on the anterior part of the abdomen and obvious dorsal spines. In the fourth immature stage or 'pupa', females are larger (1.25 mm long) than males (1 mm long). This stage is black, has numerous dorsal spines and is often surrounded by a white fringe of waxy secretion. This is the stage required for identification purposes(from CABI 2004). Marginal teeth large and blunt with between 3.5 and 5 teeth per 0.1mm. Spines of submarginal row usually with 11 pairs, some much longer than others and with the third posteriormost pair doubled. (Martin 1999).

Adults are winged in both sexes, the females (1.7 mm long) being larger than the males (approximately 1.33 mm long). The wings are dark grey at ecdysis, sometimes developing a metallic blue-grey sheen later; lighter markings on the wings appear to form a band across the insect. The body is orange to red initially; the thorax darkens to dark grey in a few hours. The limbs are whitish with pale yellow markings (from CABI 2004).

 

 

More Information
Author
Walker, K.
Created
27/05/2005 04:28 AEST
Last Updated
25/11/2011 10:47 AEST
Citation
Walker, K. (2005) Citrus blackfly (Aleurocanthus woglumi) Updated on 11/25/2011 10:47:54 AM 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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