THE EFFECT OF NICOSULFURON TANK-MIXES AND TIME OF APPLICATION ON SUNRUNNER PEANUT (ARACHIS-HYPOGAEA)

Field experiments conducted in Marianna, Trenton, and Archer, FL in 19 90 and 1991 investigated the effect of time of application of nicosulf uron and nicosulfuron mixtures on 'Sunrunner' peanut. Nicosulfuron was applied alone at 36 g ai/ha and in mixture with acifluorfen, bentazon , chlorimuron, chlorothalonil, fluazifop-P, imazethapyr, lactofen, or pyridate at 5, 7, or 9 weeks after planting (WAP). Applying nicosulfur on with chlorimuron, pyridate, or imazethapyr increased visible peanut injury and reduced yields more than nicosulfuron alone. Conversely, n icosulfuron applied with acifluorfen or lactofen was less injurious th an nicosulfuron applied alone. Bentazon, chlorothalonil, and fluazifop -P generally did not influence phytotoxicity from nicosulfuron. Peanut tolerance to nicosulfuron increased with age.