Abstract
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 standard pyrethrum spray. It must be pointed out that this statement should apply only to a pyrethrum solution used as a standard for comparison in laboratory tests.
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PARKIN, E. Pyrethrum Sprays. Nature 150, 124 (1942). https://doi.org/10.1038/150124d0
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DOI: https://doi.org/10.1038/150124d0
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