Persistence of Pyrethrins and Gamma Isomer of Benzene Hexachloride

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IN view of Beckley's advocacy of pyrethrum dust for weevil control in bagged grain1, the following comparison with the gamma isomer of benzene hexachloride is of interest.

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  1. 1

    Beckley, V. A., Nature, 162, 737 (1948); E. Afric. Agric. J., 14, 71 (1948).

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BOVINGDON, H. Persistence of Pyrethrins and Gamma Isomer of Benzene Hexachloride. Nature 163, 731–732 (1949) doi:10.1038/163731b0

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