An inordinate number of invading insect pests have been detected during the past 11 years in southern San Diego County. The first was citrus white-fly in 1966, then woolly whitefly later in 1966, the Japanese beetle in 1973, and the Oriental fruitfly in 1971 and 1974 (along with occasional captures of Mexican fruitflies in McPhail traps).

This research was funded in part by the California State Department of Food and Agriculture and the California Citrus Advisory Board for research on biological control of woolly whitefly and by NSF Grant 75-04223. “Principles, Strategies, and Tactics of Pest Population Regulation and Control in the Citrus Ecosystem”. The authors also appreciate the assistance of D. McEnery, S. Olson, M. Reynolds, M. Thornton, S. Warner, and W. White.