Tests with Synergists for Pyrethrum Against the Body Louse1

Abstract
Sesame oil and D.H.S. Activator (ethy-lene glycol ether of pinene) increased slightly the toxicity of pyrethrins against the body louse, Pediculus humanus corporis, but both were inferior to IN- 930 (N-isobutyl-undecylenamide), which increased the initial toxicity of pyrethrins about 100 times.

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