Aerial Spraying

a-1 This picture, taken in Ohio around 1922, shows one of the earliest efforts to apply insecticides with an airplane. A biplane is being used to dust catalpa groves attacked by the catalpa sphinx. It is flying around 80 miles an hour at an altitude of from 20 to 35 feet.
Airplanes were used in the 1920's for pink bollworm and boll weevil control. Dusts have just been loaded into this World War I "Jenny" biplane to be used against the boll weevil. Two men usually handled the spray job. a-2
a-3 Aerial spraying is a team job. When an outbreak of armyworms occurred in Cole County, Illinois, spray-plane pilots from Tennessee and Missouri joined those in Illinois to bring the infestation under control. Here they are going over final details before taking off.
Aerial spraying and dusting keep more than 6,000 planes busy. The helicopter is one of the newest type of aircraft to prove useful in insect pest control. Compared to regular airplanes, helicopters can operate from nearby open fields without the need for extensive airport facilities, can hover over a target, and the downwash from the rotors, as shown above, helps put the insecticide deep into the foliage of dense trees. a-4

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