These traits are accomplished by altering the solubility, volatility, specific gravity, corrosiveness, shelf-life, compatibility, or spreading and penetration characteristics. Purposeįormulation adjuvants are added to the active ingredient for a number of reasons including better mixing and handling, increased effectiveness and safety, better distribution, and drift reduction. Selected trade names and manufacturers of special purpose adjuvants. The liquid that is sprayed over the top of a crop, weeds, or insect pest often will contain both formulation and spray adjuvants. Broadly defined, "an adjuvant is an ingredient that aids or modifies the action of the principal active ingredient." The use of adjuvants with agricultural chemicals generally falls into two categories: (1) formulation adjuvants are present in the container when purchased by the dealer or grower and (2) spray adjuvants are added along with the formulated product to a carrier such as water.
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