The impact of thrips damage to seedling cotton, yield and maturity delays has been documented for decades. Thrips (Thysanoptera: Thripidae) densities were measured in both no-till and conventional till cotton on both Cruiser STtreated and untreated plants. Thrips samples were collected from plots seven times in 2003 and four times in 2004. In treated plots, adult thrips numbers were significantly higher in no-till plots over eleven sampling periods during the two years. On nine dates, there was no difference in tillage systems. In untreated plots, adult thrips numbers were higher June 17, 2003 in no-till plots and higher June 9, 2004 in conventional till plots. Thrips larval numbers were higher twice in treated conventional-till plots and twice in untreated conventional-till plots.
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