How to Make Pyrethrum Garden Spray: 6 Steps (with Pictures)
Mar 04, 2021·This is a controversial pesticide. Many web sites say it is harmless to humans and mammals and that it degrades quickly, but some studies indicate that it is very harmful to humans, dogs, cats, and that it lingers in dust. See Cox, Caroline, 2002, Insecticide Factsheet Pyrethrins/Pyrethrum, Journal of Pesticide Reform, Vol. 22, No. 1, 14–20.