#$%^&*AU2017200064B220180920.pdf#####1001694156 Abstract of the Disclosure The disclosure relates to a cotton variety, designated PX843 1RF-CB, the plants and seeds of the cotton variety PX843 1RF-CB, methods for producing a cotton plant, either varietal or hybrid, produced by crossing the cotton variety PX843 1RF-CB with itself or with another cotton plant, hybrid cotton seeds and plants produced by crossing the variety PX843 1RF-CB with another cotton variety or plan, methods for producing a cotton plant containing in its genetic material one or more transgenes, and the transgenic cotton plants produced by that method. This disclosure also relates to cotton varieties derived from cotton variety PX843 1RF-CB, to methods for producing other cotton varieties derived from cotton variety PX8431RF-CB, and to the varieties derived by the use of those methods.