What is a characteristic of rotenone?

Rotenone is a natural insecticide that targets fish and certain aquatic organisms, and its effectiveness can indeed be limited in conditions of high turbidity. Turbidity refers to the cloudiness or haziness of a liquid caused by large numbers of individual particles that are generally invisible to the naked eye. When water is highly turbid, the presence of these particles can absorb or scatter light, which affects the ability of rotenone to be effective. The chemical relies on certain environmental conditions to function optimally, and high turbidity can inhibit its ability to penetrate the water and reach its target organisms.

Understanding this characteristic is crucial for effective pest control in aquatic environments, as it helps in deciding when and how to apply rotenone for best results. The other choices provided do not accurately represent the characteristics or uses of rotenone. For instance, it does not enhance plant growth, it may have restrictions based on application and regulatory guidelines rather than being labeled always as a non-restricted use pesticide, and it is typically available in various formulations, which can include emulsified types.