What is the term for a pesticide used specifically to kill or control fish populations?

The term for a pesticide used specifically to kill or control fish populations is "piscicide." This term is derived from the Latin word "piscis," which means fish, and it specifically designates chemicals or substances that are designed to target fish. Piscicides are employed in various aquatic pest management practices, including the removal of invasive fish species, controlling population levels, and managing fish diseases, thereby helping to maintain the ecological balance in aquatic ecosystems.

In comparison, fungicides are used to control fungal organisms, herbicides target unwanted plants, and insecticides are designed to eliminate insects. Each of these terms is specific to the types of organisms they are intended to control, highlighting the importance of using the correct term when discussing pest control methods in aquatic environments.