Influence of Cover Crops on Management of Amaranthus Species in Glyphosate- and Glufosinate-Resistant Soybean

• DOI: 10.1017/wet.2017.30
• Publication Date: 2017-08-15T06:30:00Z
• Authors: Mark M. Loux; Anthony F. Dobbels; Kevin W. Bradley; William G. Johnson; Bryan G. Young; Douglas J. Spaunh...; Jason K. Norsworthy; Matheus Palhano; Lawrence E. Steckel
• Keywords: Glufosinate; Clomazone; Growing season

A field study was conducted for the 2014 and 2015 growing season in Arkansas, Indiana, Illinois, Missouri, Ohio, Tennessee to determine effect of cereal rye either oats, radish, or annual ryegrass on control Amaranthus spp. when integrated with comprehensive herbicide programs glyphosate-resistant glufosinate-resistant soybean. species included redroot pigweed, waterhemp, Palmer amaranth. The two were: a PRE residual followed by POST application foliar (PRE/POST); herbicide, another (PRE/POST/POST). Control not affected type soybean resistance trait. At end season, herbicides controlled 100 96% pigweed amaranth, respectively, versus 49 29% absence herbicides, averaged over sites other factors. PRE/POST PRE/POST/POST treatments 83 90% waterhemp at 14% without herbicide. Cover crop amaranth yield, only herbicides. cover consistently reduced density compared no treatment.