Omiodes diemenalis (Guenée, 1854)
Bean Leafroller
 (one synonym : Asopia lydialis Walker, 1859)
SPILOMELINAE,   CRAMBIDAE,   PYRALOIDEA
 
Don Herbison-Evans
(donherbisonevans@yahoo.com)
and
Stella Crossley

Omiodes diemenalis
(Photo: courtesy of Buck Richardson, Kuranda, Queensland)

This species of Caterpillar is a pest on various types of Bean ( FABACEAE ), such as

  • Soybeans ( Glycine max ),
  • Garden Beans ( Phaseolus vulgaris ), and
  • Mung Beans ( Vigna radiata ).

    It lives in a shelter made from a rolled up leaf.

    Omiodes diemenalis
    mating pair
    (Photo: courtesy of Ian McMillan, Imbil, Queensland)

    The adult moth is yellow, with brown broad wavy bands and spots. There are two dark hair pencils each side of the thorax, looking like a demonic pair of horns. It has a wingspan of about 2 cms.

    Omiodes diemenalis
    underside
    (Photo: courtesy of Graeme Cocks, Townsville, Queensland)

    It is found in south-east Asia across to the western Pacific, including:

  • Cook Islands,
  • Hong Kong,
  • Sri Lanka,
  • Thailand,

    and in Australia including:

  • Northern Territory, and
  • Queensland.

    Further reading :

    Ian F.B. Common,
    Moths of Australia,
    Melbourne University Press, 1990, pl. 9.5, p. 357.

    Achille Guenée,
    Deltoïdes et Pyralites,
    in Boisduval & Guenée :
    Histoire naturelle des insectes; spécies général des lépidoptères,
    Volume 9, Part 8 (1854), p. 203, No. 151.

    Peter Hendry,
    The Night of the Crambidae,
    Butterfly and Other Invertebrates Club Newslettter,
    Issue 49 (June 2008), pp. 26-29.

    Buck Richardson,
    Tropical Queensland Wildlife from Dusk to Dawn Science and Art,
    LeapFrogOz, Kuranda, 2015, p. 44.

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    (updated 30 January 2013, 24 August 2023)