Not a pyrethram derivative?
park's textbook of preventive and social medicine 23rd edition *synthetic pyrethroids devoloped so far are tetramethrin,resethrin,prothrin and propahin *they are now being devoloped to replace natural pyrethrins some are found to be as much as 10ttimes as effective as naturally occuring pyrethrins .
Cypermethrin
Permithrin
DDT
Resmethrin
Environment and health