In ancient Persia (current-day Iran), the natural insecticide Pyrethrum, made from dried Chrysanthemum flowers, was utilized ...

Jussieu), pyrethrin formulated with piperonyl butoxide and certain synthetic organic pyrethroid, carbamate, organophosphorus and chlorinated hydrocarbon insecticides were applied to mixed lifestage ...

DDT, the “wonder insecticide” that had millions of dollars ... They should contain both DDT and pyrethrum (or some similar toxicant). The pyrethrum knocks flies and mosquitoes down quickly.