TAMMY: Pyrethrum is a natural insecticide, made from plants in the now-obsolete genus of daisies that included chrysanthemums and tanacetum. The active chemicals in these plants are called pyrethrins ...
IN my article published in NATURE of June 27 (p. 720) on “Biological Assay of Insecticidal Sprays”, it was stated that a solution of pyrocatechol in ether was recommended as a stabilizer for the ...
Spraying on a systematic scale should be started before commencement of mosquito breeding and continued throught the malaria transmission season. Pyrethrum is prepared from dried flowers of Pyrethrum ...
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