Chrysodeixis subsidens (Walker, 1858)
(one synonym : Plusia pseudochalcytes)
PLUSIINAE, NOCTUIDAE

Don Herbison-Evans ( donherbisonevans@yahoo.com )
&
Stella Crossley

(updated 7 August 2004)


(Photo: courtesy of the Macleay Museum, University of Sydney)

Caterpillars of this species are semi-loopers because some of their ventral prolegs are reduced and this makes them move looper fashion, like the Caterpillars of GEOMETRIDAE.

The Caterpillar is an agricultural pest at times, attacking:

  • Cabbage ( Brassica oleracea, BRASSICACEAE ),
  • Silver Beet ( Beta vulgaris cicla, CHENOPODIACEAE ),
  • Spearmint ( Mentha spicata, LAMIACEAE ), and
  • Tomato ( Lycopersicum esculentum, SOLANACEAE ).

    They also attack other plants such as:

  • Capeweed ( Arctotheca calendula, ASTERACEAE ).


    The adult moth is predominently brown in colour, with bunched hairs on its head which look like a short pair of horns. On each fore wing is a silvery figure of eight, with the segments fused together, unlike its kindred species: Chrysodeixis eriosoma, in which the parts are separated. The hind wings are fawn in colour with a dark brown terminal area. The moths have a wingspan of about 3 cms.


    The species occurs over the south Pacific, and through the northern half of Australia. The specimen shown was taken in Sydney.


    (Specimen: courtesy of the Macleay Museum, University of Sydney)


    Further reading :

    Ian F.B. Common, Moths of Australia, Melbourne University Press, 1990, pp. 65, 460.


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