COMPARISON OF IMAZETHAPYR AND PARAQUAT-BASED WEED-CONTROL SYSTEMS IN PEANUT (ARACHIS-HYPOGAEA)

Field studies were conducted from 1991 through 1993 to compare weed co ntrol, peanut tolerance, yield, and net return from imazethapyr applie d alone or in combination with paraquat. Sicklepod and Florida beggarw eed were controlled with paraquat early POST followed by a POST applic ation of either paraquat with 2,4-DB or paraquat with 2,4-DB and benta zon. Imazethapyr-based early POST treatments offered no improvement. A n early POST application of paraquat with bentazon or imazethapyr was required for maximum control of bristly starbur. Imazethapyr applied a lone early POST, with no further treatment, provided optimum yellow nu tsedge control. Maximum yield and net return were associated with any paraquat-containing early POST-applied treatment followed by one of th e tank mixed POST options.