TY - JOUR AU - Schnathorst, W. C. TI - Reinfection possibilities for angular leaf spot pathogen in California cotton JF - California Agriculture JO - Calif Agr Y1 - 1969/02/01 VL - 23 IS - 2 SP - 17 EP - 18 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v023n02p17 AB - ANGULAR LEAF SPOT of Cotton (Gossypium hirsutum), caused by the bacterium Xanthomonas malvacearum, became established in California in about 1951. By 1962, however, sanitation had eradicated it from cotton fields, and attempts in 1966-67 to demonstrate cotton-gin-contamination failed even though contamination had been readily demonstrated in 1958-60, when the disease was widespread.