2,4-Dichlorophenoxyacetic acid (2,4-D) was first marketed to control broadleaf weeds in 1945 and since that time has become one of the most widely used herbicides in the world. 2,4-D formulations include esters, acids, and several salts (WHO 1989). The dimethyl-amine salt (DMA) and 2-ethylhexyl ester (EHE) formulations account for approximately 90-95% of its total global use (Charles et al. 2001).The loss of access to 2,4-D would most certainly force applicators to switch to more expensive alternative herbicides and would likely result in decreased crop yields. Cost increases for agricultural uses associated with such a ban could be anywhere from $53 to $102 million. Cost increases for non-crop uses range from $130 to $510 million.