What is the substance called that makes up the bulk of pesticide formulations alongside the active ingredient?

The substance that makes up the bulk of pesticide formulations alongside the active ingredient is known as an inert ingredient. Inert ingredients are not the primary active components responsible for pesticide action but are critical to the formulation's effectiveness, stability, and application properties. They can serve various functions, such as acting as solvents, carriers, or stabilizers to ensure even distribution and enhance the efficacy of the active ingredient.

Identifying inert ingredients is crucial for understanding the overall composition of pesticides, as they can influence how a pesticide performs and interacts with the environment and target pests. In contrast, chemical additives, stabilizers, and enhancers can refer to specific components or roles within a formulation, but they do not represent the broad category that comprises the bulk alongside active ingredients. Understanding the role of inert ingredients helps in managing pest control effectively and safely.