What characteristic is associated with synthetic pyrethroids in comparison to carbamates?

Synthetic pyrethroids are generally considered to be less toxic to humans and animals in comparison to carbamates. This is one of the key characteristics that sets them apart. Synthetic pyrethroids are designed to target the nervous systems of insects while minimizing toxicity to mammals and humans. This reduced toxicity profile is largely due to their chemical structure, which allows for effective pest control with a lower risk of harm to non-target species.

Carbamates, on the other hand, can affect humans and animals more significantly because they inhibit the enzyme acetylcholinesterase, which is vital for proper nerve function. In contrast, synthetic pyrethroids do not directly inhibit this enzyme, resulting in a reduced toxic impact on mammals.

By being less toxic, synthetic pyrethroids can often be used in environments closer to humans and pets without the same level of concern that comes with the use of carbamates. This makes synthetic pyrethroids a preferred choice in many situations where exposure risks need to be minimized.