Because they are biodegradable compounds, pyrethrins are being phased out in favor of pyrethroids, a group of synthetic analogues of pyrethrin, for insecticide uses, and appear to have an insect repellent effect when present in non-fatal doses.
Pyrethrins are being phased out in favor of pyrethroids for insecticide uses. Pyrethrins appear to have an insect repellent effect when present in non-fatal doses. They are biodegradable compounds. Pyrethroids are a group of synthetic analogues of pyrethrin.