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active constituents of pyrethrum flowers used as standard contact insecticide in fly-sprays etc remarkable for the very rapid paralysis ('knock-down' effect) produced on flies, mosquitoes etc.
püretriinid . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/p%C3%BCretriinid/1/est (23.07.2026)
