Fate of Bromoxynil n‐Butyrate and iso‐Octanoate Applied as a Mixture to a Wheat Field

Abstract
Dissipation of bromoxynil (3,5‐dibromo‐4‐hydroxybenzonitrile), applied as a 1:1 mixture of the n‐butyrate and iso‐octanoate esters, in the air, crop, and soil components was measured in a spring wheat (Triticum aestivum L.) field, both during and following its application. Drift losses during spraying were 75% of the total ester residues on the crop being lost or hydrolyzed 24 h after treatment. There were no detectable residues in the seed or straw at harvest. In the soil, the half‐lives of n‐butyrate and iso‐octanoate were 95% dissipation occurring only after 8 wk.

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