Loxostege commixtalis, the alfalfa webworm, is a species of moth in the family Crambidae.

It is found in Fennoscandia, Estonia and northern Russia.

[1] It is also found in North America, where it ranges from Nova Scotia and Newfoundland and Labrador west to the Yukon.

[2] Adults are on wing from June to July in North America and from May to July in Europe.

The larvae feed on various succulent plants, including sugar beet and alfalfa.