Abstract
Ovicidal activity of synthetic juvenile hormone analogues was evaluated for human body lice. Among five compounds tested, p-ethyl phenyl epoxy geranyl ether (Compound No. 5) was most effective in blocking embryonic development when the adults were continuously contacted to cotton pads impregnated with the compound, showing that the LD_<50> was about 27μg/(cm)^2. Contrary to the general conception that the JH has no effect on the survival of adult insects, many of lice continuously exposed to the SJHA could not survive for longer period than the controls. Mortality of the lice treated with 0.016 μg/(cm)^2 of Compound No. 5 exceeded by 50% at day 10. The results are of special interest to control the human body lice which has become resistant to all conventional insecticides.
