The fruittree leafroller, Archips argyrospila (Walker), recently has been found feeding on a new host, baldcypress (Taxodium distichum (L.) Rich.) at outbreak levels in Louisiana. The general biology of A. argyrospila and the impact of its parasitoids, predators, and hyperparasitoids found in infestation areas in and near the Atchafalaya Basin in Louisiana are described. The hymenopteran parasitoid, Itoplectis conquisitor (Say), caused the greatest amount of pupal parasitism. Two carabids, Plochionus timidis Haldeman and Calleida viridipennis Say, were found to be important predators of larvae and pupae.