Which of the following products is considered an impregnated product?

Impregnated products are those in which pesticide active ingredients are incorporated or embedded into a carrier or substrate, allowing for a slow and sustained release of the pesticide over time. In the context of the choices given, pet collars and livestock ear tags are designed with this principle in mind.

For example, pet collars are infused with insecticides that help in repelling or killing fleas and ticks over an extended period, while livestock ear tags are embedded with pesticides that protect animals from pests. This enables a controlled release of the pesticide, providing ongoing protection without requiring frequent reapplication.

In contrast, granular pesticides are solid formulations that are spread out over a surface but are not impregnated in a product; they do not provide the sustained release feature characteristic of impregnated products. Aerosol sprays deliver pesticides in a fine mist but lack the embedding aspect of impregnated products. Liquid concentrates are typically mixed with water before application and do not contain the active ingredients embedded in a carrier or substrate. Therefore, the nature of pet collars and livestock ear tags truly defines them as impregnated products.