CONTROL OF PALMER AMARANTH (AMARANTHUS-PALMERI) IN PEANUT (ARACHIS-HYPOGAEA) WITH POSTEMERGENCE HERBICIDES

Seven postemergence (POST) herbicides were evaluated alone and in vari ous mixtures for Palmer amaranth control in peanut from 1992 through 1 994. AC 263,222 at rates as low as 0.04 kg/ha controlled greater than or equal to 95% Palmer amaranth. Imazethapyr at rates of 0.05 to 0.07 kg/ha controlled greater than or equal to 90% Palmer amaranth in 2 of 3 yr. Acifluorfen alone or in combination with bentazon or 2,4-DB and lactofen alone controlled > 90% Palmer amaranth in 2 of 3 yr. Bentazon or pyridate failed to provide adequate control (less than or equal to 60%), while 2,4-DB provided good control (80%) in only 1 of 3 yr.