Insecticide being loaded in a DH-4 and dusted over lakes and swamps in Tallulah, Louisinia to kill malaria mosquitoes.

Activities of the US Army Air Service in Tallulah, Louisinia. Insecticide being loaded into a hooper on a modified DH-4 De Havilland. The DH-4 in flight over lakes and swamps. It dusts the insecticide to kill malaria mosquitoes.