Herbicide molecules that are weak acids, such as glyphosate, can affect both formulation stability and absorption efficiency. In commercial glyphosate-based herbicides (GBHs), glyphosate is combined with water, surfactants, salts, and other formulants, typically accounting for about 40% of the formulation (Defarge et al., 2018). These formulations may include glyphosate in the form of an acid or as various salts, such as monoammonium, diammonium, isopropylamine, potassium, sodium, and trimethylsulfonium. Despite this diversity, only the parent acid exerts herbicidal activity at plant target sites, making the acid equivalent of each formulation the critical measure when comparing efficacy.
Moon et al. (2018 . . .
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