Which type of chemical is specifically mentioned as being the only one registered for use in Florida?

The correct answer is Temephos, which is highlighted for its specific registration for use in Florida. Temephos is an organophosphate insecticide that has been utilized primarily for mosquito control. Its registration by the state means it has undergone rigorous assessment to ensure it meets safety and efficacy standards for public health applications, particularly in managing vector-borne diseases. This chemical plays a crucial role in public health efforts aimed at reducing populations of mosquitoes that can transmit viruses like West Nile and Zika.

In Florida, the importance of effective vector control is heightened due to the state's subtropical climate, which creates an ideal breeding ground for mosquitoes. Temephos is thus actively used in various programs aimed at protecting the public from the health risks posed by these insects. The specificity of its registration showcases the state's commitment to employing formulated and regulated methods to manage pest populations while safeguarding environmental and public health.

Other choices do not hold the same status regarding specific registration for use in Florida as Temephos does. Monomolecular surface films are used in different contexts and may not be registered for public health use directly. Bacillus thuringiensis is a biological control agent that is used, but it is not stated as the only chemical registered specifically for use