In recent years the twospotted spider mite, Tetranychus urticae (Koch), has become a serious pest of vegetables in the piedmont and mountains of North Carolina. While mites do not infest all fields within the region, the cost to control mites in infested fields often exceeds $75 per acre. A diversity of vegetable fields representing different crops, planting dates, pesticide history, and surrounding habitat were sampled throughout the growing season. These data were used to assess the phenology and dispersal of mite infestations in different crops and weed habitats, and to identify those factors contributing to infestations of individual fields.