INFLUENCE OF HERBICIDES AND TIMING OF APPLICATION ON BROADLEAF WEED-CONTROL IN PEANUT (ARACHIS-HYPOGAEA)

Field studies mere conducted from 1992 through 1994 to evaluate applic ation timing of seven postemergence (POST) broadleaf herbicides alone and in mixtures for control of eclipta and pitted morningglory. Imazet hapyr and 2,4-DB did not control eclipta while AC 263,222 applied earl y postemergence (EPOST) at 0.07 kg/ha provided greater than 90% contro l in 2 of 3 yr. EPOST applications of bentazon, acifluorfen + bentazon , and pyridate controlled eclipta at least 92% all 3 yr. Lactofen appl ied EPOST at 0.28 kgka provided similar levels of eclipta control in 2 of 3 yr. Imazethapyr controlled pitted morning glory > 70% when appli ed EPOST. AC 263,222 controlled 0pitted morningglory a minimum of 83% when applied EPOST at 0.04 or 0.07 kg/ha. Pitted morningglory control was al least 85% With 2,4-DB applied alone or in a mixture with AC 263 ,222, acifluorfen, imazethapyr, lactofen, or pyridate, Effective weed control increased peanut yields up to 98% over the untreated check.