ABSTRACT

Field studies were conducted to examine several glyphosate tank mix combinations to broaden the weed control spectrum and provide better residual weed control. Studies were established in Athens and Plains, GA in 2002 using standard small-plot technique examine the following tank-mix combinations with glyphosate (840 g ai/ha) applied at layby application: diuron (600 & 840 g ai/ha); carfentrazone (4 g ai/ha); diclosulam (24 g ai/ha); cloransulam (18 g ai/ha); CGA 362622 (6-11 g ai/ha); halosulfuron (18 g ai/ha); flumioxazin (35 & 70 g ai/ha); flufenapyr (18 g ai/ha); amicarbazone (100 g ai/ha) and oxyfluorfen (140 g ai/ha). None of the tank-mixes caused more than 15% cotton injury 7 or 30 days after treatment. All treatments provided >95% Texas panicum, Palmer amaranth, and sicklepod control 7 and 30 DAT. All treatments provided >95% tall morningglory control 7 DAT, but by 30 DAT, flufenpyr and diuron were 85 and 88%, respectively. All treatments except diuron and glyphosate alone provided >90% yellow nutsedge control. Seed cotton yields did not significantly differ at either location.