Abstract: Field studies were conducted in 1994 and 1995 to evaluate CGA-152005 for weed control and effect on peanut (Arachis hypogaea) yield in Texas peanut production areas. CGA-152005 at 10 to 20 g/ha controlled eclipta (Eclipta prostrata), golden crownbeard (Verbesina enceliodes), and Palmer amaranth (Amaranthus palmeri) > 90% when applied preemergence (PRE) or soon after peanut emergence (EPOST). CGA-152005 postemergence (POST) controlled eclipta > 95%; sandhills amaranth (Amaranthus arenicola) 99%; golden crownbeard, pitted morningglory (Ipomoea lacunosa), and hophornbeam copperleaf (Acalypha ostryifolia) < 80%; and Palmer amaranth and ivyleaf morningglory (Ipomoea hederacea) from 37 to 89%. CGA-152005 injured peanut up to 37% and reduced yield up to 94%.
Nomenclature: CGA-152005 (proposed common name prosulfuron), 1-(4-methoxy-6-methyl-triazin-2-yl)-3-[2-(3,3,3-trifluoroprophyl)phenylsufonyl]urea; eclipta, Eclipta prostrata L. #3 ECLAL; golden crownbeard, Verbesina enceliodes (Cav.) Benth et Hook # VEREN; hophornbeam copperleaf, Acalypha ostryifolia Riddell # ACCOS; ivyleaf morningglory, Ipomoea hederacea (L.) Jacq. # IPOHE; Palmer amaranth, Amaranthus palmeri S. Wats. # AMAPA; pitted morningglory, Ipomoea lacunosa L. # IPOLA; sandhills amaranth, Amaranthus arenicola I.M. Johnst. # AMAAR; peanut, Arachis hypogaea L. ‘GK-7.’
Additional index words: Groundnut, preemergence, postemergence, weed management.
Abbreviations: EPOST, early postemergence; POST, postemergence; PPI, preplant incorporated; PRE, preemergence.
