Abstract
Two experiments (nursery and field) were conducted at the Adjuntas substation during 1990 and 1991 to evaluate fluazifop {(±) [2-[4-[[5-(trifiuoro-methyl)-2-pyridinyl]oxy] phenoxy]propanoic acid]} and quizalofop {(±)-2-[4[(6-chloro-2-quinoxa(inyl)oxy]phenoxy] propanoic acid} for weed control and phytotoxicity in coffee (Coffea arabia L). Fluazifop at 0.28 and 1.12 kg ai/ha and quizalofop at 0.22 and 0.90 kg ai/ha were applied as a postemergence spray. The herbicides at the indicated rates gave good to excellent control of all grasses present in both experiments. No crop injury was noted with either herbicide. The highest coffee berry yield of 14,088 kg/ha obtained in plots treated with fluazifop at 1.12 kg ai/ha rate was not significantly different (P = .05) from the lowest yield of (10,038 kg/ha) obtained in plots treated with quizalofop at 0.22 kg ai/ha rate.