REANALYSIS OF THE MACNAY,C.G. MOSQUITO REPELLENT DATA

Data reported by C. G. MacNay on the protection periods of 38 repellen ts tested in the field against Aedes sticticus, Aedes stimulans, Aedes vexans, and Aedes trichuris in 1937 were reanalyzed by current method s. Protection periods decreased by 7.6 min. for each 1 degrees C incre ase in air temperature over the range 17-27 degrees C. Treatment means were adjusted to the 22.2 degrees C level to permit comparison of the treatments on an equal basis. Pyrethrum extract, pine tar oil distill ate, thyme oil, thymol, and geraniol provided 3 or more hr. protection . Geranium oil, citronella oil, cedar oil, American pennyroyal oil, an d camphor provided relatively short protection. Confidence limits and multiple comparison data are provided for the adjusted treatment means .