Phytotoxicity of Chlorimuron and Tank Mixtures on Peanut (Arachis hypogaea)

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Abstract
Studies were conducted in 1989 and 1990 to determine the phytotoxicity of chlorimuron and tank mixtures on ‘Florunner’ peanut. Chlorimuron plus a petroleum oil adjuvant or 2,4-DB was more phytotoxic (P = 0.05) than chlorimuron plus a nonionic surfactant, based on stunting and chlorosis. Chlorimuron mixed with chlorothalonil, chlorothalonil plus sulfur, or esfenvalerate were no more phytotoxic than the standard. Adding sulfur or nonionic surfactant to chlorimuron plus chlorothalonil did not affect phytoxicity. Sequential applications of chlorimuron and 2,4-DB did not completely negate the phytotoxicity of the tank mixture. Despite differences in phytotoxicity, yields were not reduced.