TY - JOUR AU - Michelbacher, A. E. AU - Swift, John E. TI - Parasites of the frosted scale: Tests in northern California show natural enemies of scale control pest when not depleted by sprays JF - California Agriculture JO - Calif Agr Y1 - 1954/04/01 VL - 8 IS - 4 SP - 9 EP - 10 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v008n04p9 AB - The frosted scale–Lecanium pruinosum Coquillett–occurs in most of the walnut orchards in northern California.