G. Steven Sibbelt is Form Advisor, University of California Cooperative Extension, Tulare County; Charles E. Curtis is Entomologist, Agricultural Research Service, U.S. Department of Agriculture, Fresno, California; Marvin Gerdts, formerly Extension Pomologist, Parlier, is agricultural consultant, Western Ag Speciolists, Reedley, California. Jimmy D. Clark is Technician, Agricultural Research Service, U.S. Department of Agriculture, Fresno, California;