Aerial application, or crop dusting,
Agricultural aircraft are highly specialized, purpose-built aircraft. Today's agricultural aircraft are often powered by turbine engines of up to and can carry as much as of crop protection product. are sometimes used, and some aircraft serve double duty as in areas prone to wildfires. These aircraft are referred to as SEAT, or "single engine air tankers."
History
Aerial seed sowing
The first known aerial application of agricultural materials was by John Chaytor, who in 1906 spread seed over a swamped valley floor in
Wairoa, New Zealand, using a hot air balloon with mobile tethers.
Aerial sowing of seed still continues to this day with cover crop applications and rice planting.
Crop dusting
The first known use of a heavier-than-air machine to disperse products occurred on August 3, 1921.
Crop dusting was developed under the joint efforts of the U.S. Department of Agriculture and the U.S. Army Signal Corps' research station at
McCook Field in Dayton, Ohio.
Under the direction of McCook engineer
Etienne Dormoy, a United States Army Air Service Curtiss JN4 Jenny piloted by John A. Macready was modified at McCook Field to spread
lead arsenate to kill catalpa sphinx
caterpillars at a
catalpa farm near Troy, Ohio in the
United States.
The first test was considered highly successful.
The first commercial cropdusting operations began in 1924 in Macon, Georgia[ Macon local news (subscription required)] by Huff-Daland Crop Dusting, which was co-founded by McCook Field test pilot Lt. Harold R. Harris.
File:Etienne Dormoy and John A. Macready in front of 1st crop duster aircraft.JPG|Lt. Macready (right) and McCook Field engineer E. Dormoy (left) in front of the 1st crop duster airplane (August 3, 1921)
File:World first crop duster aircraft.jpg|First crop dusting used a Curtiss JN Jenny
Top dressing
Aerial topdressing is the aerial application of fertilisers over farmland using agricultural aircraft. It was developed in New Zealand in the 1940s and rapidly adopted elsewhere in the 1950s.
Purpose-built aircraft
In 1951, Leland Snow designed the first aircraft specifically built for aerial application, the S-1. In 1957, The Grumman G-164 Ag-Cat was the first aircraft designed by a major company for agricultural aviation. Currently, the most common agricultural aircraft are the
Air Tractor, Cessna Ag-wagon, Gippsland GA200, Grumman Ag Cat, PZL-106 KRUK, M-18 Dromader,
PAC Fletcher, Piper PA-36 Pawnee Brave, Embraer EMB 202 Ipanema, and Rockwell Thrush Commander, but multi-purpose
are also used.
Unmanned aerial application
Since the late 1990s, unmanned aerial vehicles have also been used for agricultural spraying. This phenomenon started in Japan and South Korea, where mountainous terrain and relatively small family-owned farms required lower-cost and higher-precision spraying. , the use of UAV crop dusters, such as the
Yamaha R-MAX, is being expanded to the United States for use in spraying at vineyards.
[Evan Ackerman, Yamaha Demos Agricultural RoboCopter, But Humans Can't Unleash It Yet, IEEE Spectrum, Oct. 16th 2014.]
Concerns
The National Institute of Environmental Health Sciences keeps track of relevant research.
Historically, there has been concerns about the effects of aerial applications of pesticides and the chemicals' effects as they spread in the air. For example, the aerial application of
mancozeb is likely a source of concern for pregnant women.
Bans
Since the 1970s, multiple countries started to limit or ban the aerial application of pesticides,
, and other products out of environmental and public health concerns, in particular from spray drift. Most notably, in 2009, the
European Union prohibited aerial spraying of pesticides with a few highly-restricted exceptions in article 9 of
Directive 2009/128/EC of the European Parliament and of the European Council establishing a framework for Community action to achieve the sustainable use of pesticides, which effectively ended most aerial application in all member states and overseas territories.
Guidelines
The United States Environmental Protection Agency (EPA) provides guideline documents and hosts webinars about best practices for aerial application.
In 2010, the United States Forest Service collected public comments to use within a Draft Environmental Impact Statement (DEIS), which was developed because the Montana Federal District Court ruled that aerial application of fire retardants during wildfires violated the Endangered Species Act.
See also
