Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract only
Publication Acceptance Date: 1/14/2011
Publication Date: 1/31/2011
Citation: Price, A.J., Patterson, M.G., Monks, C.D., Kelton, J.A. 2011. Evaluation of a high-residue cultivator for palmer amaranth control in conservation - tillage systems [abstract]. National Cotton Council Beltwide Cotton Conference. CDROM. Interpretive Summary:
Technical Abstract: Resistant Palmer amaranth control in conservation systems continues to challenge producers. Beltwide cotton recommendations currently include sequential soil applied herbicides in an attempt to prevent Palmer amaranth emergence. However, in the event activation is inadequate, alternative postemergence control options are needed. An experiment was conducted evaluating a high-residue sweep cultivator in both conventional and conservation tillage systems. Herbicide treatments included Prowl at 29 oz/ac plus Reflex at 16 oz/ac applied broadcast or banded PRE followed by RoundUp POST at 23 oz/ac. Cultivation treatments included either rolling cultivator or sweep cultivators applied late POST. Results indicate >90% Palmer amaranth, tall morningglory, or sicklepod control when the sweep cultivator was utilized in combination with herbicides. Neither cultivation treatment alone provided adequate weed control. The sweep disturbed relatively little residue when utilized in a high-residue setting. Future research will compare weed control utilizing high-residue sweeps in various weed control systems augmenting control when soil applied herbicides utilized in controlling resistant Palmer amaranth fail due to lack of activation.