The interrupted dagger moth (Acronicta interrupta) is a moth of the Noctuidae family. It is found across southern Canada south of the Boreal forest, from New Brunswick west to eastern Alberta, south to Georgia, Nebraska and Arizona. The wingspan is 35–42 mm. Adults are on wing from April to August or September depending on the location. There are two or more generations per year in the south and one in the north. The larvae feed on apple, apricot, birch, cherry, crabapple, elm, hawthorn, Hop-Hornbeam, mountain-ash, oak, plum and willow.