A Comparison of Cyclethrin, Allethrin, Pyrethrins, and Mixtures of Piperonyl Butoxide or Sulf oxide with Them in House Fly Sprays

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Abstract
With the announcement of the synthesis of a new synthetic pyrcthroid, cyclethrin, and of evidence that it is more highly synergized by certain synergists than allethrin (Haynes et al. 1954), it became desirable to evaluate this material by the Campbell turntable method with the house fly, Musca domestica L., as the test insect. Cyclethrin is the mixture of isomeric esters formed by the acylation of dl-2-(2-cyclopentenyl)-3-methyl-2-cyclopenten-4-ol-1-one with a mixture of cis and trans dl-chrysanthemumic acids, and so differs from allethrin in possessing the cyclopentenyl ring instead of the allyl group in position 2 of the cyclopentenolone nucleus. For simplicity the material will be referred to in this paper as a single compound. It was compared with allethrin and pyrethrins in simple space sprays and in mixed sprays containing allethrin synergists. This paper reports these comparisons.

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