Why are plant pathogens not widely used in Florida for aquatic weed control?

Plant pathogens are not widely used in Florida for aquatic weed control mainly due to importation restrictions. Regulatory frameworks are often stringent when it comes to the transport and use of biological control agents, including pathogens. This is particularly crucial in Florida, a state with a unique ecosystem and numerous native species that could be adversely affected by introduced pathogens. Importation restrictions help to prevent the spread of diseases that could harm local flora and fauna or disrupt existing ecosystems.

While efficacy is an important consideration, it's not the sole reason for their limited use. Cost and environmental concerns also play substantial roles, but the primary limitation in this context is the regulatory landscape that aims to protect Florida's delicate ecosystems from potential risks associated with introducing non-native pathogens.