National Geographic : 1944 Feb
U.S.Public Health Service Aerial "Gas" Attack Annihilates an Army of Malaria Mosquitoes near Decatur, Alabama Here in Tennessee Valley Authority territory, flooding of lowlands by new dams created many breeding places for mosquitoes. Initscontrol program, TVA dusts 75 tons of Paris green by plane every year. Half a pound of the poison is enough for an acre. It is mixed with powdered soapstone for dusting inaratio ofabout 1to4.