Abstract
IT has already been shown that the irritant and paralysing effects of the pyrethrins are of material influence in determining the dose of insecticides accumulated by flying insects in pyrethrum-bearing sprays1.
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References
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BLACKITH, R. Primary and Secondary Responses in Biological Assay. Nature 161, 20–21 (1948). https://doi.org/10.1038/161020b0
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DOI: https://doi.org/10.1038/161020b0
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