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Greasy Cutworm

Scientific Name
Agrotis ipsilon aneituma
Scientific Author
(Walker, 1865)
Taxonomy
(Lepidoptera: Noctuidae: Noctuinae: Noctuini)
Pest Status
0 Unknown
Status
NZ - Native
Reliability
High
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Diagnostic Images

Dorsal - Adult
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Caption
LEP41
Source
Caroline Harding MAF
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Diagnostic Images (12)
Diagnostic Notes
Adult

Male: Expanse 35.6-50.4 mm. Forewing without black bar between orbicular and reniform spots, costal one-third of forewing strongly suffused with dark fuscous, much darker than remainder of wing; forewing with tapering black bar between reniform spot and postmedial line. Valva much broader distally than at base, strongly curved near apex; corona with strong tapering spines; clasper slender, curved, acute; clavus small, inconspicuous; vesica of aedoeagus with single dentate ridge. Female: Expanse 42.0-55.6 mm. Forewing without black bar connecting orbicular and reniform spots; forewing with tapering black bar between reniform spot and postmedial line; forewing with most veins not conspicuously outlined with light grey. Hindwing more or less completely suffused with fuscous, though slightly paler basally. Ductus bursae, bursa copulatrix, and bursa seminalis slender, elongate; signum a well-developed oval thickened ridge; ostium a shallow cup.

Egg

About 0.5mm in diameter, and generally between 600-800 eggs are laid. The whitish colour soon turns to light brown.

Larva

Length up to 50 mm. Colour light grey to dark brown, of a rather greasy appearance, with two yellowish longitudinal stripes. Integument with pebble-like ("granulate") scobinations; integumental scobinations flattened (planoconvex) and closely arranged, contiguous; head capsule median suture less than half frons length; head capsule with adfrontal area demarcated; setal groups D, SD, L with setae "normal", not pallid or blunt apically in later instars.

References

- Bejakovich, D. & Dugdale, J.S. (1991). Keys to late-instar larvae & adults of Noctuidae (Lepidoptera) encountered in field surveys and border control in New Zealand. 55 pp.

- Common, I.F.B. (1958). The Australian cutworms of the genus Agrotis (Lepidoptera:Noctuidae). Australian Journal of Zoology, 6: 69-88.

- White, E.G. (2002). New Zealand tussock grassland moths: a taxonomic and ecological handbook. Manaaki Whenua Press, Lincoln, 362 pp

More Information
Specimen Contact
MAF Plant Health & Environment Laboratory
Author
MAF Plant Health & Environment Laboratory
Created
29/07/2011 10:20 AEST
Last Updated
07/05/2014 02:35 AEST
Citation
MAF Plant Health & Environment Laboratory (2011) Greasy Cutworm (Agrotis ipsilon aneituma) Updated on 5/7/2014 2:35:44 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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