It depends. Some additives do things like condition the water. For example, adding ammonium sulfate to the water before using a glyphosate product conditions the water so the chemical is not immediately tied up by impurities in the water. If you want glyphosate to fail (Roundup), just mix it up in dirty water. For it to work the very best, use distilled water. So in this case the additive is to condition the water so the product works as advertised.

I'm not sure why surfactants or sticker spreaders can not be incorporated in the product. It may be because it causes an antagonism and the closer to application the less the bad effect. Some chemicals they micro encapsulate to help with the antagonism problem.

Best follow the label if you want it to work. The place that sells the chemical should also have the appropriate supporting products.

John

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