Which type of piscicide is derived from a root to kill fish?

The type of piscicide that is derived from a root to kill fish is botanicals, specifically rotenone. Rotenone is a natural substance obtained from the roots of certain plants, particularly those in the genus Derris and Lonchocarpus. It has been used for many years in fish management and aquaculture for its ability to effectively reduce fish populations in ponds and lakes, especially when trying to eliminate invasive species or manage fish communities.

This natural compound works by inhibiting cellular respiration in fish, leading to their death, and it is valued for being biodegradable and less persistent in the environment compared to synthetic chemicals. Being derived from a plant source makes it an attractive option for those seeking organic or less toxic solutions in aquatic environments. Other types of piscicides, such as synthetic piscicides, are chemically manufactured and do not originate from natural plant sources, while biodegradable piscicides encompass a broader range that may not specifically refer to those derived from botanical origins. Herbicidal piscicides are designed to target aquatic plants rather than fish, making them unsuitable in addressing fish populations directly. Thus, the identification of rotenone as a botanical piscicide aligns directly with its natural origin and application in fish management.