Field trials were conducted to evaluate the efficacy of selected at-planting insecticides across three soil environments. These trials were conducted on an alluvial silt loam (Commerce silt loam), an alluvial clay (Sharkey Clay), and a loessial silt loam (Gigger silt loam). Across soil environments, the Temik 15G treatment (0.5 lb AI/acre) provided significantly greater control of adult thrips compared to all other treatments, except for the Orthene 90S treatment (0.9 lb AI/acre). In the Commerce silt loam trial, all of the insecticide treatments resulted in significantly lower population densities of immature thrips compared to the untreated control. In the Sharkey clay trial, all of the insecticide treatments resulted in significantly lower population densities of immature thrips compared to the untreated control. Also, Temik 15G and Gaucho 480S (4.0 oz AI/acre) provided significantly greater control of immature thrips compared to Orthene 90S or Orthene 80S (6.4 oz AI/cwt). All of the insecticide treatments resulted in significantly lower population densities of immature thrips compared to the untreated control, in the Gigger silt loam trial. Also, the Temik 15G treatment provided significantly greater control of immature thrips compared to the Orthene 90S or Orthene 80S treatments. Across soil environments, all of the insecticide treatments significantly improved crop maturity compared to the untreated. However, the insecticide treatments did not significantly improve lint yield compared to the untreated control.