They are all basically the same thing, they are all actually non-ionic surfactants. Depending on the herbicide you are using, it may or may not require the use of a surfactant with it. Sometimes they require a surfactant that is of a certain percentage, and in that case you would want to use Dyneamic as it is 99%, which is a very high quality surfactant, which is why it is also the most expensive of the 3. Most herbicides, though, don't specify, and the non-ionic from Southern Ag will work just great with most herbicides.
Answer last updated on: 12/20/2011