The subject at hand is pesticide formulations, and I know you are ecstatic to learn about this topic! A pesticide formulation consists of active and inert (inactive) ingredients that are combined to form an end-use pesticide product. Just to review, active ingredients are the chemicals in the pesticide product that affect or control the target pest. Inert, or inactive, ingredients are added to dilute the pesticide to make it safer, more effective, or easier to handle. Common pesticide formulations you may see at your local garden center include: