The tomato pinworm (TPW) is a major pest of tomatoes in southern California, Florida, southeastern Texas, and Mexico. In California, it is especially serious on fall-crop tomatoes, where it attacks both foliage and fruit and may cause extensive fruit damage if not controlled.

The authors gratefully acknowledge the assistance of J. Hayashi, G. Platner, and H. Nakakihara, Department of Entomology, University of California, Riverside, for their help in collection of field data. Research reported here was supported in part by the California Fresh Market Tomato Advisory Board.