Dudley E. Pinnoch is Associate Professor of Entomology, University of California, Berkeley, and Associate Insect Pathologist in the Agricultural Experiment Station; Kenneth S. Hagen is Professor of Entomology., University of California, Berkeley, and Entomologist to the Agricultural Experiment Station; Daniel V. Cassidy as Landscape Specialist, California Department of Transportation; Richard J. Brand is Associate Professor of Biostatistics, School of Public Health, University of California, Berkeley; James E. Milstead is Staff Research Associate III, Department of Entomological Sciences, University of California, Berkeley; Richard L. Tasson is Staff Research Associate IV, Department of Entomological Sciences, University of California, Berkeley.