A series of trials were established in 1996 to further investigate findings reported during the 1996 Cotton Beltwide Conference (Smith et. al., 1996). Smith concluded from the 1995 evaluation of selected commercial varieties and two BXN® varieties that BXN58 and BXN57 were more sensitive to sequential treatments of Staple (pyrithiobac) than the other cultivars evaluated. Smith also concluded that there was a trend for BXN58 and ST132 to be more sensitive to early over-the-top (EOT) applications.