As suggested by its name, this moth uses the Allium genera as its main food. This moth is considered an economically important pest in some parts of the world. They're most problematic in allotments and commercial farms.
Mine the leaves of Allium plants.
Adults: These moths are fairly inconspicuous. They have a wingspan of 6mm, with brown-red-grey brindled patterning. Larvae: They're small white maggots with brown heads, which feed inside the leaves of the crop. They can sometimes be seen if the crop is opened up. Pupae: Larvae pupate outside the plant, appearing like meshed brown bumps on stems and leaves. If spotted, these should be picked off and disposed of.
White patches on leaves. Tunnels, or mines, in the stems of Allium. Plants infected by larvae may rot. Sometimes plants will die.
Europe, Algeria and some parts of Asia and North America
An insect-proof mesh as a means to protect crops is suggested. Regular inspection and picking off pupae will help control numbers of future generations.
Unfortunately, there are currently no chemical treatments available for home gardeners that will give effective control over this pest.