"Why will they be going up?" 2,4D prices have been steadily increasing this summer do to demand from overseas. At least that is what NuFarm told me and it seems to be true. You have to remember that many of the core components of most herbicides all come from the same source and many times that source is overseas itself. Many factors can be involved in price fluctuation and that is why profitable companies in the LCO business often switch vendors. Why would they switch vendors? Because they bid the season on contract and swings in the price of product dictate the profit margins.