Which biocontrol agent was released in Florida in 1986 and 1987 and has formed self-perpetuating populations?

The water lettuce weevil is recognized for its introduction in Florida during 1986 and 1987, specifically targeting water lettuce as a biocontrol agent. The significance of this weevil lies in its ability to establish self-perpetuating populations, which contributes to effective long-term management of aquatic weeds. These self-sustaining populations allow for continuous biological control without the ongoing need for human intervention or reintroduction.

Biological control strategies often rely on agents like the water lettuce weevil that can adapt and thrive in the local environment, creating a balance that reduces the prevalence of invasive species such as water lettuce. The success of this agent can lead to decreased herbicide use and lower ecological disruptions compared to chemical control methods.

In contrast, while other options may be associated with aquatic weed control, they do not exhibit the same self-perpetuating characteristics or were not introduced in the same time frame, underscoring the unique role of the water lettuce weevil in Florida's aquatic ecosystem management strategy.