ABSTRACT
168Frigate, a formulated ethoxylated fatty amine, was investigated as a glyphosate adjuvant. In physiological studies, Frigate at 0.5% (v/v) increased uptake, translocation, and distribution of [14C]-glyphosate in Johnsongrass and quackgrass. Detrimental effects of metal ions in glyphosate solutions were reduced greatly when Frigate was added at 0.5% (v/v). Addition of Frigate and X-77 to water at 0.125 to 1.00% (v/v) reduced apparent surface tension, but did not further reduce surface tension when mixed with glyphosate solutions. Ammonium sulfate at 1 to 4% (w/v) had no effect on surface tension when added either to water or to glyphosate (Roundup) solutions. In the greenhouse, glyphosate (Roundup) with Frigate substantially reduced regrowth of Johnsongrass and enhanced rain tenacity of Roundup on sorghum.
