Sharppod Morningglory [ Ipomoea Trichocarpa VAR Trichocarpa ELL.] Control In Roundup Ready Flex® and Libertylink® Cotton

Morningglory species are among the most common and troublesome weed species in the southern cotton producing states (Anonymous 2001).  Ipomoea spp. account for the largest percentage (18.2%) of U.S. cotton crop lost due to weeds and are estimated to infest 500,000 acres of cotton in Texas (Byrd 1999).  Although studies have been conducted to determine effective control of annual morningglory species, few deal with control of the perennial sharppod morningglory (Ipomoea trichocarpa var. trichocarpa Ell.).  Furthermore, data is lacking for comparing sharppod morningglory control in two popular transgenic crop herbicide programs, Roundup Ready Flex^®1 and LibertyLink^®2 cottons.  Research was conducted to determine the advantages of one herbicide program over the other while simultaneously evaluating control of sharppod morningglory by different treatments consisting of a combination of preemergence and postemergence herbicides.