TY - JOUR AU - Michelbacher, A. E. AU - Bacon, O. G. TI - Spider mites on walnuts: Continued experiments in northern California groves indicate insect control program to keep mites in check JF - California Agriculture JO - Calif Agr Y1 - 1952/06/01 VL - 6 IS - 6 SP - 4 EP - 15 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v006n06p4 AB - Spidier mite injury has increased during the past several years in northern California walnut groves.