Diamondback moth, Plutella xylostella L., is one of the most important pests of collards in the U.S. In 2003, we collected ecological data and developed lifetables of DBM in two distinct regions of Virginia: 1) Painter, on the Eastern Shore Peninsula; and 2) Blacksburg, in the ridge of valley region in the western part of the state. Lifetable data revealed a total mortality (from egg to adult stage) of greater than 99% for Diamondback moth on collards at both locations. 20-83% mortality occurred from eggs not hatching; 40-60% mortality occurred during neonate establishment; 29-82% mortality occurred to small larvae; 21-80% mortality occurred to large larvae; and 74-81% mortality occurred to pupae. The primary pupal mortality factor was parasitism by Diadegma insulare and Oomyzus sp. Significant differences occurred between locations for certain mortality factors.