Morley’s Final Catalogue: Never seen in Bentley Woods. Uncommon in Ipswich, on palings in June and at light in September; Felixstow, Foxhall, Winston; in Monks Soham museum and at light in 1931 abundant at Southwold in 1891 (EMM. xxvii, 221) and common in July 1901, sitting in the salterns there under Atriplex port. on 16 July 1912 and beside Benacre Broad at roots of Glaucium flavum in sand on 19 September 1920; Blythburgh Wood, Ashby; on Fritton sugar, and Gorleston palings. Sitting on pine-trunks at Mildenhall; Kennet . ' The most ubiquitous Microlepidopteron; found everywhere, and the most regulär migrant' (Whit).
Recent Status: A very common, sometimes abundant immigrant, that can become an agricultural and garden pest in some years.
Life Style: The species can be found all year round as an immigrant. Larvae can survive the winter in mild locations/years. They feed on any member of the Brassicaceae family. They feed underneath leaves with a slight web. There can be many on a leaf of larger plants such as commercially grown brassicas.
Identification: The species can be very variable in pattern and colour, sometimes not showing any sign of patterning and at other times with markings in addition to the three pale dorsal marks that give rise to the ‘Diamond Back Moth’ name when seen from above.
Recorded in 51 (88%) of 58 10k Squares.
First Recorded in 1891.
Last Recorded in 2018.