Smithsonian Report, 1948.—Knipling PLATE 3 
1. Dusting with DDT. DDT applied as a dust was found to give good control, 
at dosages as low as | pound of active ingredient on 20 acres. Paris green, 
formerly used, required 1 pound per acre. 
cB 
erwenebiad, 
2. The first DDT sprayer employed on aircraft for mosquito control. This 
unit, known as the Husman-Longcay spray, was designed for the Piper Club 
(L-4). The equipped airplane was called the “Flying Flit Gun.” It was 
employed primarily as an experimental unit. 
