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- Author or Editor: Jeffrey M. Higgins x
Abstract
Field experiments were conducted with the objective of determining the response of tall fescue (Festuca arundinacea Schreb.‘CIemfine’) to various amounts of single and sequential treatments of sethoxydim and fluazifop at 0.10, 0.20, or 0.30 kg·ha-1 and xylafop, haloxyfop, fenoxaprop, and poppenate at 0.07, 0.15, or 0.30 kg·ha-1 These herbicides are known to control grass weeds such as crabgrass (Digitaria spp.) and goosegrass [Eleusine indica (L.) Gaertn.] Turf color was acceptable following single and sequential fenoxaprop applications through 49 days after treatment (DAT). Turf density was not affected by single applications, but was slightly reduced by sequential applications. Single and sequential applications of poppenate provided acceptable turf color in 1985, except at 14 DAT at the high rate. In 1987, turf color was acceptable at 49 DAT. Turf density was reduced with the 0.30 kg·ha-1 single poppenate application. Sequential applications of poppenate also reduced turf density. Fenoxaprop provided acceptable turf color and density for either single or sequential applications, while poppenate provided acceptable turf color for single application at 49 DAT. Unacceptable turf color and density were observed for both years with single and sequential applications of fluazifop, sethoxydim, haloxyfop, and xylafop. Chemical names used: 2-[1-(ethoxyimino)buty]–5–[2–(ethylthio)propyl]–3–hydroxy–2–cyclohexen–1–one (sethoxydim); (±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxylphenoxy]propanoic acid (fluazifop); 2-[4-[[3-chloro-5-(trifluoromethyl)–2–pyridinyl]–propanoic acid (haloxyfop); (2-[4-[(6-chloro-2-quinoxalinyl)-oxy]phenoxyl]propanoic acid (xylafop); (±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid (fenoxaprop); and methyl 3-hydroxy-4-[4-[[5–(trifluoromethyl)–2–pyridinyl]oxy]phenoxy]–pentanoate (poppenate).