Economic importance ■ The Lepidoptera are of considerable economic importance. The larva of most species are phytophagous, and many are serious pest of cultivated plants;a few feed on various fabrics,and a few feed on stored grain or meal.Economic importance ◼ The Lepidoptera are of considerable economic importance. ◼ The larva of most species are phytophagous, and many are serious pest of cultivated plants; a few feed on various fabrics, and a few feed on stored grain or meal