What is a substance used to dilute a pesticide concentrate called?

The term for a substance used to dilute a pesticide concentrate is commonly referred to as a diluent. Diluents are essential in pesticide applications, as they help to reduce the concentration of the pesticide, making it easier and safer to apply. They can aid in evenly distributing the active ingredients over a target area and can also improve the performance and effectiveness of the pesticide by enabling better coverage and adhesion to the surfaces being treated.

Adjuvants, although sometimes confused with diluents, primarily enhance the effectiveness of the pesticide itself rather than simply acting as a vehicle for dilution. Solvents are typically used to dissolve solid pesticides or to assist in the formulation of pesticide products, but they do not necessarily fit the definition of a diluent in the context of diluting a pesticide concentrate for use. Carriers are broad terms that refer to any substance that carries or transports the active ingredient, but this is more general than the specific role of diluents. Thus, "diluent" specifically captures the function of a substance used to dilute pesticide concentrates.