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Aerial application

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Aerial application is a specialized method of managing farmland from the sky.

Gehling PLZ106AR Kruk OTT 2013 D7N9017 009
Gehling PLZ106AR Kruk OTT 2013 D7N9017 009

It involves using agricultural aircraft to spray crops with various protection products. This process includes planting specific types of seeds across large areas. In some countries, spreading fertilizer from the air is known as aerial topdressing. This method is highly efficient for large-scale operations. In the United States, aerial application accounts for about 25% of pesticides used on commercial farms. Furthermore, nearly 100% of forestry products are applied using these aerial methods.

The mechanics of aerial application require highly specialized, purpose-built aircraft.

Schweizer 269C (VH-FUJ) takes off at Devonport Airport
Schweizer 269C (VH-FUJ) takes off at Devonport Airport

Modern agricultural aircraft often utilize powerful turbine engines to achieve necessary flight performance. These machines are designed to carry massive loads of crop protection products. Some operators choose to use helicopters for specific tasks. Interestingly, some of these aircraft serve a dual purpose in emergency situations. They can function as water bombers to fight wildfires. These specific aircraft are called SEATs, which stands for single engine air tankers.

There are several distinct types of aerial application tasks. One primary type is the sowing of seeds, which is still used today for rice planting and cover crops. Another major type is topdressing, which is the application of fertilizers over farmland. This specific practice was developed in New Zealand during the 1940s. It was then rapidly adopted by other nations throughout the 1950s. Additionally, the application of insecticides and fungicides is a common task. While early operators spread actual dust, modern applicators typically use liquid products in very small doses.

The history of this field began with unconventional methods. In 1906, John Chaytor performed the first known aerial application of agricultural materials. He used a hot air balloon with mobile tethers to spread seed over a swamped valley in Wairoa, New Zealand. The transition to heavier-than-air machines occurred on August 3, 1921. This development resulted from joint research by the U.S. Department of Agriculture and the U.S. Army Signal Corps.

An engineer named Etienne Dormoy directed these early efforts at McCook Field in Ohio.

Detailed testing led to the first successful use of a modified Curtiss JN4 Jenny.

Bundesarchiv Bild 183-1987-0721-301, Agrarflieger, Düngen, Forstwirtschaft
Bundesarchiv Bild 183-1987-0721-301, Agrarflieger, Düngen, Forstwirtschaft

Pilot John A. Macready flew the aircraft to spread lead arsenate near Troy, Ohio. This was done to kill catalpa sphinx caterpillars on a local farm. Following this success, commercial operations began in 1924 in Macon, Georgia. The company Huff-Daland Crop Dusting started these operations. It was co-founded by Lt. Harold R. Harris, a test pilot from McCook Field. The term "crop dusting" became popular because the machines actually spread dust across the plants.

Aircraft design has evolved significantly to meet these needs. In 1951, Leland Snow designed the S-1, the first aircraft built specifically for this work. Later, in 1957, the Grumman G-164 Ag-Cat became the first agricultural aircraft designed by a major company. Today, many different models are in use globally. These include the Air Tractor, the Cessna Ag-wagon, and the PZL-106 KRUK. Other common models are the M-18 Dromader, the Embraer EMB 202 Ipanema, and the Rockwell Thrush Commander.

YamahaRMax
YamahaRMax

These diverse machines allow for precise application across different terrains.

Technological shifts have introduced unmanned aerial vehicles, or UAVs, into the industry. Since the late 1990s, these drones have been used for agricultural spraying. This trend began in South Korea and Japan due to mountainous terrain. Small, family-owned farms there required higher precision and lower costs. Now, UAVs like the Yamaha R-MAX are expanding into the United States to spray vineyards. However, the industry must manage significant environmental and public health concerns. Organizations like the National Institute of Environmental Health Sciences monitor research on these chemicals. One specific concern involves the effects of mancozeb on pregnant women.

Regulatory bodies also play a major role in managing aerial application. Many countries have implemented bans or limits on these products since the 1970s. This is often done to prevent spray drift, which is the movement of chemicals through the air. Most notably, the European Union prohibited most aerial pesticide spraying in 2009. This was done through Directive 2009/128/EC to promote sustainable pesticide use. In the United States, the Environmental Protection Agency (EPA) provides guidelines and webinars. The U.S. Forest Service also manages impacts through environmental statements to protect endangered species.

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🖼️ Images & Media (5)
File:Gehling PLZ106AR Kruk OTT 2013 D7N9017 009.jpg
Gehling PLZ106AR Kruk OTT 2013 D7N9017 009.jpg
File:Bundesarchiv Bild 183-1987-0721-301, Agrarflieger, Düngen, Forstwirtschaft.jpg
Bundesarchiv Bild 183-1987-0721-301,...
File:Schweizer 269C (VH-FUJ) takes off at Devonport Airport.jpg
Schweizer 269C (VH-FUJ) takes off at...
File:CROP DUSTING NEAR CALIPATRIA IN THE IMPERIAL VALLEY. (FROM THE SITES EXHIBITION. FOR OTHER IMAGES IN THIS ASSIGNMENT... - NARA - 553873.jpg
CROP DUSTING NEAR CALIPATRIA IN THE...
File:YamahaRMax.jpg
YamahaRMax.jpg
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