Naturalised through accidental introduction in dried goods in barns, warehouses, granaries and container ports throughout much of the British Isles. In Hampshire and on the Isle of Wight seldom recorded, but then seldom sought, inside flour mills and warehouses. Wingspan 20-25 mm. One of six very similar species of
Ephestia found in the UK, which are generally separable only by dissection of the genitalia, most wild-caught individuals being
E. unicolorella, with the other five species favouring warehouses. The largest
Ephestia species, forewing darker grey than in the other species, discal dots more conspicuous and second line characteristically deeply indented near costa [Goater]. Larva feeds on wheat-flour, dried fruit, nuts, dried goods, cereals and grain, causing sufficient damage to be a serious pest in some areas.