Problems in the Manufacture of Liquid Household Insecticides of the Petroleum Extract of Pyrethrum Type

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The manufacturer of these products is confronted with a number of perplexing questions which include: the concentration of the toxic constituents to be used, the use of Pyrethrum powder or concentrated extracts in preparing his product, the selection of satisfactory petroleum fractions and perfumes.

Document Type: Research Article

Publication date: February 1, 1931

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