Orthosia populeti, the lead-coloured drab, is a moth of the family Noctuidae.

Forewings brown-grey, slightly purplish-tinged; first, median, and second lines somewhat darker, especially on costa; orbicular and reniform darker, outlined with pale; subterminal line pale greyish-ochreous, edged anteriorly in middle with two small red-brown or black marks.

[1] Orthosia populeti is difficult to certainly distinguish from its congener Orthosia incerta See Townsend et al.[2] The moth flies in one generation from the beginning of March to May [1].

The egg is greyish white with dark grey girdled dots.

When full grown the caterpillar is whitish or yellowish green, but always whitish on the back: three white lines on the back, the central one rather broad; head ochreous brown with a blackish spot on each side.