A simple and effective device for housefly control with insecticides.

A simple, portable frame tied with string soaked in insecticide has been devised by the authors to give a much greater chance for houseflies to contact the insecticide residue. Shell Dieldrex 15 was tested on the frame both in the laboratory and in the field with excellent results. The residual effect seems to last at least up to two-and-a-half months. No ill-effect resulting from the handling of dieldrin-treated frames has been observed. As the frame method is cheap and effective for housefly control, it can be introduced into any community which has unsatisfactory sanitation and where the housefly is still susceptible to insecticide.