Recent Examples of pyrethrin from the Web
The Extension recommends using a fast-acting aerosol insecticide containing pyrethrins if fire ants are detected among flood debris, though these insecticides can be toxic to aquatic organisms, so caution is recommended.
Pyrethrins and pyrethroids also work by interfering with sodium pores.
Most wasp killers contain pyrethrins, which are derived from botanical sources.
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Origin and Etymology of pyrethrin
First Known Use: 1882See Words from the same year
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Britannica.com: Encyclopedia article about pyrethrin
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