Research was conducted in 1998 and 1999 to determine the impact of early-season insecticide treatments on thrips population densities, fruit production, and lint yield in ultra narrow-row (UNR) cotton production systems. Insecticides commonly used in conventional row-spacing cotton systems were used in UNR cotton plots. Differences in thrips control between treated plots and no treatment were observed in both years. Generally, early bloom counts did not differ in treated plots compared to untreated plots. In both years, treatments did not significantly impact lint yield compared with no treatment.