L. A. Falcon is Assistant Invertebrate Pathologist, Division of Invertebrate Pathology, University of California, Berkeley; T. F. Leigh is Associate Entomologist, Department of Entomology, U. C. Davis; R. van den Bosch is Entomologist, Division of Biological Control, U. C. Berkeley; J. H. Black is Farm Advisor, Agricultural Extension Service, Kern County; V. E. Burton is Extension Entomologist, U. C. Davis;