Acrolepiopsis assectella

The leek moth or onion leaf miner (Acrolepiopsis assectella) is a species of moth of family Acrolepiidae (formerly Glyphipterigidae) and the genus Acrolepiopsis. The species is native to Europe and Siberia, but is also found in North America, where it is an invasive species. While it was initially recorded in Hawaii, this was actually a misidentification of Acrolepiopsis sapporensis. The leek moth is similar in appearance to other members of the genus Acrolepiopsis, with mottled brown and white wings. Its wing span is approximately 12 mm across. It is a pest of leek crops, as the larvae feed on several species of Allium by mining into the leaves or bulbs. The shape of the leaf mine is variable, ranging from a corridor to a blotch, and can be with or without frass. This leaf mining can occur in the tubular leaves or in the stem. In the case of onions and shallots, the larvae mine into the bulb. In North America, where the moth is an invasive species and has few known natural predators, the species threatens the production and biodiversity of Allium, and it has the potential to destroy entire crops. The parasitoid Diadromus pulchellus is used to control the spread of and damage caused by the leek moth in Europe and North America.

from Wikipedia