TY - JOUR AU - Michelbacher, A. E. TI - Spider mites on walnuts: False spider mite, European red mite, and Pacific spider mite infestations in northern California walnuts during 1955 JF - California Agriculture JO - Calif Agr Y1 - 1956/07/01 VL - 10 IS - 7 SP - 4 EP - 14 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v010n07p4 AB - The false spicier mite—Brevipalpus lewisi McGregor—first became a potential pest of walnut in the 1955 season although it has been known in California since 1944.