Studies on prallethrin, a new synthetic pyrethroid, for indoor applications : I. The insecticidal activities of prallethrin isomers

Abstract

The eight possible isomeric forms of prallethrin, which is an analog of allethrin containing a propargyl group in place of the allyl group, were in detail examined for biological activities. The ester, which has the d configuration in the ketoalcohol moiety and the d-trans configuration in the chrysanthemic acid moiety, showed the best performance with 660 times the toxicity over the lowest toxic isomer of l-l-cis configuration from the comparison on LD_<50> values by topical application against houseflies, followed by the d-d-cis configuration. Other isomers were also studied for the order of toxic magnitude.