Active Ingredient Active ingredient (actual pesticide chemical)may require mixing with one or more chemicals in order to make it satisfactory for use. Active pesticide chemicals are frequently in a form,which is not suitable for direct application.Active Ingredient Active ingredient (actual pesticide chemical) may require mixing with one or more chemicals in order to make it satisfactory for use. A ti ti id h i l f tl A ctive pesti cid e c hemicals are frequentl y in a form, which is not suitable for direct appli ti ca on