Effect of 2,4-D formulation on volatility under field conditions

Abstract Auxinic herbicides have been commonly used in production systems for broadleaf weed control many years. One potential negative aspect to their use is propensity volatilize and move away from the treated area after application. This research examined three herbicide formulations relative amounts of vaporization following application under field conditions Knoxville, TN, 2017, 2018, 2019. Herbicide treatments evaluated included 2,4-D choline, amine, diglycolamine (DGA) salt dicamba. Ten studies were conducted with major parameters including air sampler height (0.3 1.3 m) applied surface condition (dry wheat stubble or green-plant vegetation). The volatility indicated by study was that dicamba > choline = amine. Detected concentrations numerically higher at 0.3-m sampling condition. These results confirm more volatile than there no difference vapor emissions between amine salts conditions.