Donald L. Flaherty is Entomology Farm Advisor, University of California Cooperative Extension, Tulare County; Larry Bettiga is Staff Research Associate, San Joaquin Valley Agricultural Research & Extension Center, Parlier; George M. Leavitt is Viticulture Farm Advisor, Madera County. William L. Peacock is Viticulture Farm Advisor, University of California Cooperative Extension, Tulare County;