Aerial Sprayer plane, Liberal, Kansas
Date: September 22, 1949
This black and white photograph shows a field being sprayed for noxious weeds by an aerial spray play using 2,4-Dichlorophenoxyacetic near Liberal, Kansas. 2,4-D, as it was commonly called, was a pesticide/herbicide used to control broadleaf weeds.

Aerial spray equipment
Date: February 20, 1949
This black and white image from the Topeka Daily Capital shows the aerial spray equipment operated by Don Pratt from Hays, Kansas.

Aerial spray plane
Creator: Hetzel Photo Lab, Dodge City, Kansas
Date: Between 1940 and 1950
This black and white photograph shows a field being sprayed for noxious weeds by an aerial spray plane using 2,4-Dichlorophenoxyacetic acid. The spray, commonly called 2,4-D, is a pesticide/herbicide used to control broadleaf weeds. In the foreground, a man can be seen carrying items across a field.

Aero Spray King plane, Manhattan, Kansas
Date: February 24, 1949
This black and white photographshows the Aero Spray King plane and the 2,4-Dichlorophenoxyacetic acid tank from the Ong Aircraft Corporation in Manhattan, Kansas. 2,4-D, as it was commonly called, was a pesticide/herbicide used to control broadleaf weeds.

Barrell from Chemical Corporation of Colorado
Date: Between 1950 and 1959
This black and white photograph taken at the Armstrong Air Service in Scott City, Kansas, shows the top of a barrel containing Colorado.44 25% DDT. The emulsifiable concentrated chemical was manufactured by the Chemical Corporation of Colorado in Denver. The spray from the barrel was found to be adulterated with 2.76% 2,4 - D. It had been used to spray a sugar beet field that contained garden webworm.

Horse-drawn sprayer
Date: Between 1910 and 1929
These two photographs show a group of men spraying an unidentified orchard using horse drawn sprayers with gasoline engines.

Kansas Board of Agriculture officials, Topeka, Kansas, inspecting a field
Date: July 07, 1948
This black and white photograph shows two officials from the Kansas Board of Agriculture, J.C. Mohler and Ted Yost, examining the effects of 2,4-Dichlorophenoxyacetic acid in a field southwest of Topeka, Kansas. 2, 4-D, as it was commonly called, was a pesticide/herbicide used to control boardleaf weeds. Mohler was the secretary of the Board of Agriculture.

Mahon's Flying Service, Dodge City, Kansas
Date: Between 1940s and 1950s
This black and white photograph shows Mahon's Flying Service plane and company truck from Dodge City, Kansas. It was a custom spraying service for farmers.

Ralph Stum and John Wunder
Creator: Capper Engraving Co.
Date: Between 1950 and 1959
This black and white photograph shows Ralph Strum, on the left, talking with John Wunder from Bazine, Kansas about weeds at the Ness County Noxious Weed Department.

Roy Mahon and Ralph Stum
Date: Between 1950 and 1959
This black and white photograph shows pilot Roy Mahon, to the left, speaking with Ness County Weed Supervisor Ralph Stum about crop dusting.