Monochroa palustrellus, the wainscot neb, is a moth of the family Gelechiidae. It is found in from western, central and northern Europe to the Ural Mountains and southern Siberia.[1] The habitat consists of waste ground, dry pastures and sand-dunes.[2]
The wingspan is 17–19 mm.[3] The forewings are yellowish white, covered with black lines. The hindwings are griseous (mottled grey).[4] Adults are on wing from late June to August in one generation per year.[5]
The larvae feed on Rumex species, including Rumex crispus, Rumex aquaticus and Rumex hydrolapathum. They feed in the stem, leaf petioles or rootstock.