2006 Annual Report 4d.Progress report. This report serves to document research conducted under a Specific Cooperative Agreement between Mississippi State University and ARS. Additional details for this subordinate project may be found in the in-house project 6402-22000-045-00D entitled, "Integrated Pest Management for Mid-South Area Row Crops." Research funded by USDA-ARS was established to demonstrate weed control, sweetpotato injury, and sweetpotato grade yield to sweetpotato producers in Bolivar Co., MS. In 2002, treatments included herbicides that are currently labeled for use in sweetpotato and mechanical control, such as a rotary mower. Results were reported to the growers at the Alcorn State University Field-day and in published bulletins. In 2003, new unlabeled herbicides were added to the trials for evaluation in the Delta of Mississippi. This is important since the weed spectrum in the Delta is different compared to upland soils typically used for sweetpotato production in Mississippi. The objective of this research is to demonstrate appropriate herbicide systems that include herbicides applied alone or tank-mixed, various application timings, and herbicide rates. In addition, this research also supports research that is necessary for approving product labels for use in sweetpotato. This involves a collaborative effort with the Mississippi Bureau of Plant Industry, North Carolina State University (NCSU) and Louisiana State University (LSU). As a result, two new herbicides received "Section-18" labels for use in sweetpotato for the 2004 growing season in Mississippi. One of these two herbicides has received a full label for the 2005 growing season. Weed control, fertility, and growth regulator research is important for Mississippi sweetpotato producers to improve production practices and make efficient and productive management decisions.