Really nice blog post by colleague Surendra Dara with a discussion of the US EPA requirement that adjuvants and surfactants be used in pesticide residue studies to permit their use by the label and the subsequent withdrawal by that agency of this requirement:
//ucanr.edu/blogs/strawberries-vegetables/
This regulatory change matters to growers because a few pesticides have had restrictions on their labels that they be NOT be applied with adjuvants or surfactants. Since we know that these materials only serve to enhance the performance of a pesticide, be it to distribute the material more evenly over the surface of the plant, adjust tank mix pH, prevent foaming and so on, this restriction has been truly baffling.
A changed stance on the part of the agency regarding this aspect of pesticide labeling is encouraging, and as a matter of fact has already resulted in Chemtura submitting a request to amend its Rimon label to remove the current restriction with adjuvants and surfactants.
Go to the link and read the article.