Definitionn. made of dried flower heads of pyrethrum plants
Last update: July 5, 2015
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Pyrethrum cinerariaefolium is exported for the manufacture of insect-powder, and sunflowers are cultivated for the oil contained in their seeds. [Please select]
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Extracts of pyrethrum flowers are now generally available commercially, and these give fairly good results in the destruction of house flies in buildings. [Please select]
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Most of the sprays of pyrethrum extract contain kerosene oil as a carrier, and undoubtedly the kerosene has much to do with the toxicity of the spray. [Please select]
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