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Published online by Cambridge University Press: 31 May 2012
The Insect Powders of commerce are the powdered flowers of different species of Pyrethrum. Those of Pyrethrum carneum and roseum were introduced some thirty years ago under the name of Persian Insect Powder, and subsequently those of Pyrethrum cinerariæ folium, a native of Dalmatia, Austria, as Dalmatian Insect Powder.