The determination of residues of 2,4‐D in post‐emergence‐treated triticale

Abstract

AbstractA gas chromatographic method, using electrolytic conductivity detection, is presented for the determination of 2,4‐0 as its methyl ester in triticale (X Triticosecale Wittmack). The method was used to monitor the dissipation of 2,4‐0 residues in triticale over a growing season at two sites following post‐emergence application of the dimethylamine salt of 2,4‐D at 0.56 kkg ha−1. Initial residues, in the order of30 mg kg−1. on the day afer application (3‐ to 4‐leaf stage of the crop), decreased to non‐detectable levels in the mature straw and seed. Recoveries of 2,4‐D were greater than 90% fiom green tissue fortified at 0.1 mg k−1., and in the order of 75% from seed fortified at 0.05 mg kg−1.