I remember seeing the old biplane crop Dusters as a kid in Blythe, CA in the late 1950s and early 1960s, long before any of the current specific built airplanes designed to be crop dusters were even in existence, dust and spray the large fields down there
That was long before OSHA and many of the pilots and ground folks got sick and died from the chemical back then as well as the pilots and field flagman getting hurt when the planes would break in flight and crash due to pilot error or mechanical malfunctions and failures: whiney: