Variations in the efficacy of the seed treatment abermectin have been observed in R. reniformis infested cotton fields across the southeast. This study examines the rate of development of the reniform nematode over time as effected by abermectin treated and non treated cotton seed planted in difference soil types. Two replicated greenhouse trials were conducted at the Plant Science Research Center at Auburn University. Root samples were processed at 3, 6, 9, 14, 19, 25, and 35 days after inoculation (DAI) to determine life stage development, number of nematodes per gram of root and numbers of egg masses. The life stages attained by R. reniformis were similar between the abermectin and untreated cotton root systems. The reniform-shaped females without egg masses were observed at 14 DAI, followed by mature egg-laying females at 19 DAI. Nematode development did not appear to be affected by soil type.