TY - JOUR AU - Michelbacher, A. E. AU - Middlekauff, W. W. AU - Davis, Donald TI - Payne walnuts: Codling moth investigations in northern California and recommendations for 1949 JF - California Agriculture JO - Calif Agr Y1 - 1949/03/01 VL - 3 IS - 3 SP - 3 EP - 4 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v003n03p3 AB - Throughout Northern California the codling moth infestation in 1948 was much more serious than that encountered in any recent year. The cause of this is not known although it may have been associated in part with the lateness of the season.