Status and Distribution
Rare, known with regularity from only one site in Kent where it was regularly reported until 1995 and thereafter only once in 2017. There are also single records from Devon (2002) and Hampshire (2009) but it is not known if these relate to wanderers or localised undiscovered colonies.
Bradley & Fletcher no:
Maps updated with all data received by February 2018.
Foodplant and Larval Feeding Signs
Persicaria amphibia (amphibious bistort), see plant distribution map.
A small hole in the stem, indicating the presence of a larva, has been reported in Denmark.
In England found regularly in a single extensive freshwater reed-bed. The other records are associated with a rough coastal meadow and mixed reed-bed and grassland. In Denmark it is associated with damp meadows.
Finding the Moth
Larva: look for small holes in the stem of the foodplant in September which may indicate the presence of a larva.
Adult: sweeping areas of the foodplant may be worthwhile. It comes readily to light.
Similar to, but larger than, Monochroa suffusella.
Single brooded from mid-June to July.
Earliest: 20th June 1995 (VC15)
Latest: 8th July 1984 (VC15)
There is only very limited date information available.