Published online by Cambridge University Press: 06 April 2009
A method for comparing the lethality effect of contact insecticides on mosquitoes and house-flies is proposed.
It is based on the comparison of the death-rate and the length of survival of insects after a contact for a very short and exactly measured time with a surface sprayed with a known concentration of the insecticide.
It is suggested that the same method may be used to compare the susceptibility of various species of mosquitoes and flies to the toxic action of a contact insecticide.
Some of the methods and apparatus were worked out and constructed by the Staff of No. 1 Malaria Field Laboratory under the command of the senior author. The following Officers and N.C.O.'s of the Royal Army Medical Corps were especially active in this work, and acknowledgement is made of their valuable contributions: Major T. T. Macan, Major Fox, Lt. MacDonald, Staff-Sgt. (later Major) Iles, Cpl. Mortimer.
We are also indebted to Prof. F. S. Bodenheimer and Major T. T. Macan for their help in preparing this paper.