Abstract
THE insecticidal properties of the flowers of certain species of pyrethrum (Chrysanthemum) have been known for a long period, the very high toxicity of the active principles to insects and their harmlessness to man and warm-blooded animals forming an almost unique combination of qualities. It is, however, within the last decade only that the chief advances towards a detailed knowledge of these plants have been made, and the marked interest aroused in the subject recently makes it appropriate to direct attention to the present position of investigations undertaken in Great Britain.
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FRYER, J., GIMINGHAM, C. Pyrethrum as an Insecticide and its Cultivation in England. Nature 127, 573–574 (1931). https://doi.org/10.1038/127573a0
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DOI: https://doi.org/10.1038/127573a0