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Hand mixing and spraying of DDT to kill mosquitos in their breeding areas.
Black and White
U.S. Public Health Service Training Film.
This film teaches how to create a DDT spray solution, dissolve it before use, fill a spray pump, maintain the pump, and supply spray to ponds. Specific instructions are given for how to spray and pace over different types of ponds as well as how to hold and move the spray hose, all with respect to wind direction. Walking paths are often animated with white lines and arrows showing the wind’s direction. In many parts of the film, a man is pacing and spraying properly. There is also a visual of a man checking a pond for larvae with a small white dish on a long stick. Signs on sketched columns are used to show important factors: swath width, concentration, wind speed and direction, air pressure, and movement of the sprayer. The film asserts that these actions, carried out faithfully, will control mosquito larvae efficiently and at low cost.
KEY WORDS: Dichlorodiphenyltrichloroethane (DDT), larvicide, Anopheles mosquito, Culicine mosquito, spraying, oil, spreading agent, Triton B-1956, Emulfor Ag, gallon drum, atomizing nozzle.
U. S. National Library of Medicine, History of Medicine Division, Images and Archives Section at the National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894
“DDT AS A LARVACIDE,” The Global Health Chronicles, accessed July 21, 2017, https://globalhealthchronicles.org/items/show/5182.