Thysanoplusia orichalcea, the slender burnished brass,[1] is a moth of the family Noctuidae.

It is a polyphagous pest of vegetable crops that originated in Indonesia, from where it spread to Europe, South Asia, India, Sri Lanka, Africa, Australia and New Zealand.

Sub-basal, antemedial and postmedial waved lines very indistinct, fine and whitish in colour.

The larvae feed on various herbaceous plants, including crops such as sunflower, Coreopsis, potato and soybean.

[5] In managing their population, phenylacetaldehyde, a volatile floral compound attractive to many Lepidoptera and present in Canada thistle (Cirsium arvense), was found to be effective in trapping especially the females of the species.