Although Cabbage Moth can be a serious pest to commercial cabbage growers when the larvae bore into the heart of the cabbage making it unsaleable, they eat a wide range of herbaceous plants. Always very thinly distributed in the north, Cabbage Moth appears to have declined in Caithness in recent decades and is now infrequently recorded. The adult flies in June and July having overwintered as a pupa in an underground cocoon.