What type of pesticide would be categorized as a piscicide?

The correct answer is a chemical targeting fish, as a piscicide specifically refers to any pesticide formulated to kill or control fish populations. These substances are often used in aquatic pest management for purposes such as controlling invasive fish species, managing fish stocks in ponds and lakes, or eradicating certain fish that may be harmful to local ecosystems or fisheries.

Understanding piscicides is essential in aquatic pest management, as they need to be used judiciously and in accordance with regulations to prevent ecological imbalances. Other types of pesticides, such as those targeting insects, plants, or mammals, do not fall under this category, as their target organisms are distinctly different from fish. This delineation helps pest management professionals select the appropriate pesticide for their specific needs within aquatic environments.