Agricultural Aircraft: Types, Costs per Acre and Rules

Agricultural aircraft are fixed-wing planes and helicopters built to spray or spread crop protection products, fertilizer and seed from the air. In the United States, aerial applicators treat about 127 million acres of cropland a year, roughly 28% of cropland once repeat treatments are counted, according to the National Agricultural Aviation Association (NAAA) industry facts. This guide covers the main aircraft types, what a custom aerial job costs per acre, the rules in North America, the UK and the EU, and when hiring a plane beats a ground sprayer. A calculator below lets you test that choice with your own numbers.

What agricultural aircraft do

An agricultural aircraft, often called an ag plane or crop duster, carries a tank called a hopper and a spray boom or spreader under the wings. The pilot flies low and straight over the field in passes, called swaths, and the aircraft releases product along each pass.

Common jobs include:

• Fungicide and insecticide sprays on corn, soybeans, wheat, rice and cotton when a pest or disease must be treated fast.
• Herbicide sprays, including brush control on pasture and rangeland.
• Fertilizer, such as top-dressing nitrogen on wheat or rice.
• Seeding, for example flying on cover crop seed into standing corn or soybeans, or seeding rice into flooded fields.
• Defoliants and growth regulators on cotton before harvest.
• Forest and public health work, such as forest pest control and mosquito control.

NAAA lists corn, wheat and barley, soybeans, pasture and rangeland, and alfalfa as the five crops its operators treat most often. It also says nearly all forest protection applications in the US are made by this industry.

Types of agricultural aircraft

There are four broad groups. Each one suits a different kind of farm and job.

Chart

US agricultural aircraft fleet mix

Percent of the combined fleet; fixed-wing vs helicopter and turbine vs piston are two separate splits

1. Fixed-wing turbine aircraft

These are the large single-seat planes most people picture when they think of a crop duster. They have turboprop engines and hoppers that commonly hold several hundred gallons. In the 2019 NAAA survey, 83% of fixed-wing ag aircraft were turbine powered.

Best for: large row-crop farms, rice, cotton and wheat, and jobs where many thousands of acres must be covered in a few days.

2. Fixed-wing piston aircraft

Older and smaller ag planes use piston engines. They cost less to buy but carry less and fly slower. They are still used by smaller operators and for lighter work.

Best for: smaller service areas, lighter loads and operators who want lower ownership costs.

3. Helicopters

Helicopters made up 16% of the US ag fleet in 2019 (NAAA). They can work from a truck or a small pad near the field, and they handle small, odd-shaped fields, orchards, hills and fields with power lines or trees around the edges.

Best for: orchards, vineyards, small or irregular fields, forestry and hilly ground.

4. Spray drones

Remotely piloted spray drones are the newest group. The Ohio State University fact sheet on drones for spraying pesticides reports that drones do about 30% of all agricultural spraying in South Korea and about 40% of rice spraying in Japan, while drone spraying in the US is still young. Drones carry far less than a plane, so they suit spot treatments, small fields and wet corners rather than whole farms.

Best for: spot sprays, small blocks, field edges and ground too wet for a sprayer.

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The US agricultural aircraft fleet in numbers

NAAA estimates there are about 1,560 aerial application businesses and about 3,400 ag pilots in the US. Roughly 87% of business owners are also ag pilots. Each business runs 2.3 aircraft on average, and a new or used ag aircraft can cost from about US$100,000 to nearly US$2 million depending on hopper size and engine.

The 2019 NAAA industry survey found that Texas, Minnesota, Arkansas, Louisiana, California and Nebraska were the top states for operator headquarters among those who replied. Forty-one percent of responding operators were based in the Midwest and 38% in the South.

The same survey shows how much precision equipment ag aircraft now carry. GPS swath guidance is close to universal, and most aircraft have smoke generators so the pilot can see wind direction.

Chart

Precision equipment on US ag aircraft

Percent of operators or aircraft, NAAA operator survey

How much does aerial application cost per acre?

Custom aerial application is priced per acre, usually excluding the product. The best public price data comes from state custom rate surveys. The Texas A&M AgriLife Extension custom rates survey (2026) reports these statewide averages, including operator, machine and fuel but not materials:

These are averages of the rates farmers and custom operators reported in the survey, not quotes, and the survey notes some respondents may have included chemical costs. In Texas the aerial rate for crop spray jobs (insecticide/fungicide, herbicide and growth regulator work) was only about US$0.50 to US$1.40 per acre above the ground rate. Brush spraying shows the widest gap, about US$3.85 per acre. Rates also vary by region: the aerial herbicide average ranged from about US$9 in North Texas to US$21.50 in West Texas, with few responses in some regions.

Prices in other states and countries differ. Ask two or three local operators for a quote, and check what is included: minimum charges, ferry distance, and whether the price is per acre treated or per acre of the field.

Chart

Custom spray rates in Texas: ground vs aerial

Statewide average US$ per acre, operator, machine and fuel included, materials excluded

Aerial vs ground spraying: when a plane pays

A ground sprayer is often a little cheaper per acre. A plane earns its fee in four situations:

1. Timing. When a disease or insect needs treatment within days, an aircraft can cover far more acres per day than a ground rig. NAAA notes that aerial work lets large and remote areas be treated rapidly.
2. Wet or rough ground. When soil is too wet, terrain rolls, or the crop is too tall and dense for a sprayer, aerial application may be the only option.
3. No wheel tracks. A ground sprayer running through a tall crop damages some plants in its tracks. A plane does not touch the crop or the soil, so there is no compaction.
4. Crops that are hard to drive through, such as flooded rice, mature corn or cotton before defoliation.

A ground rig can be the better choice for small fields, fields near homes, schools or sensitive crops, products whose label restricts aerial use, and windy areas where drift risk is high.

Check the yield claims

NAAA cites one crop protection maker’s study in corn where aerial application raised yield 8% more than ground application. That is a single company study, so treat it as a claim to test on your own fields rather than a rule. Your own yield maps and strip trials give a better answer.

Try the numbers for your own farm below.

Agricultural aircraft rules by country

Rules decide whether an aerial job is possible at all. Always follow the product label and local rules, and get advice from your state, provincial or national regulator before a new type of job.

United States

Aircraft that dispense pesticides, fertilizer or seed must operate under 14 CFR Part 137, the FAA rule for agricultural aircraft operations. The FAA says Part 137 also covers drones that dispense these products, and its page on dispensing chemicals with drones explains the certificate process. A University of Florida IFAS guide on regulatory requirements for spraying drones walks through Part 107, the Section 44807 exemption for heavy drones and Part 137 certification. Pilots and businesses also need a state pesticide applicator licence.

United Kingdom

The Plant Protection Products (Sustainable Use) Regulations 2012 prohibit aerial spraying unless it is covered by an aerial spraying permit, and the pilot and permit holder must meet set conditions. In practice this makes aerial spraying in the UK rare and tightly controlled.

European Union

Article 9 of the EU Sustainable Use Directive (2009/128/EC) says member states shall ensure aerial spraying is prohibited. Exceptions are allowed only in special cases, for example when the product is approved for aerial use and the operator holds a certificate.

Canada and Australia

Both countries have active aerial application industries. Federal pest control product labels set whether a product can go on by air, and provinces or states license the applicator. Check the label and your provincial or state agency before you book a job.

How to reduce spray drift from the air

The US EPA defines pesticide spray drift as the movement of droplets or dust through the air, during or soon after application, to any site other than the target. Drift can injure nearby crops and make them unsellable if the product is not registered for them.

Chart

Drift controls used by aerial operators

Percent of US operators using each method

In the 2019 NAAA operator survey, the top drift controls were drift control additives and buffer zones (each used by 90% of operators) and smoke generators to check wind (88%). Three in four operators changed droplet size by changing nozzle orifice size. As a farmer you can help by:

• Marking sensitive neighbours, hives, homes and organic or specialty crops on the field map you give the operator.
• Agreeing wind speed limits and buffer zones before the job.
• Avoiding hot, still evenings when temperature inversions can carry fine droplets a long way.
• Keeping the product label on hand and following its aerial directions.

The University of Georgia extension note on spray drone application gives a similar warning for drones: flying higher does not always widen the swath, but it does raise drift risk.

How to hire an agricultural aircraft operator

1. Check credentials. Ask for the operator’s Part 137 certificate (or national equivalent), state or provincial applicator licence and insurance.
2. Share a clear field map. Give boundaries, obstacles such as power lines and towers, and sensitive areas.
3. Confirm the product and rate. Make sure the label allows aerial use and states the carrier volume.
4. Agree timing and weather limits. Set a window and the wind and temperature limits.
5. Get the price in writing. Per acre, minimum charge, and what happens if the job is cut short by weather.
6. Ask for the application record. GPS logs show where product went, which helps with records, audits and insurance.

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Using field data to plan aerial jobs

Aircraft work best when you know which fields, or which parts of a field, need treatment. Crop health maps from satellites show where vegetation is weaker or changing faster than the rest of the field. They do not tell you the cause, so a field visit is still needed before you spray.

A tool such as the Farmonaut Satellite + AI Farm Monitoring System can show these changes field by field, so you can scout first and send the plane only where it is needed. After a job, the same maps help you check whether the crop recovered.

Related pages on our site: fleet tracking for farm vehicles, farm product traceability, farm carbon footprint tracking, crop loan and insurance checks, large-farm admin dashboard, satellite and weather API docs and the farm monitoring app.

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FAQ

What is an agricultural aircraft?

It is a plane, helicopter or drone used to apply products such as pesticides, fertilizer or seed to crops, pasture or forest from the air. In the US these flights fall under FAA Part 137.

How many acres do agricultural aircraft treat in the US?

NAAA estimates about 127 million acres a year, based on its 2019 survey, or about 28% of US cropland once fields treated more than once are counted.

Is aerial spraying more expensive than ground spraying?

Usually a little. In the Texas A&M 2026 custom rates survey, average aerial rates for crop spray jobs were about US$0.50 to US$1.40 per acre higher than ground rates (brush spraying about US$3.85 higher). Timing, wet ground and avoided wheel-track damage can outweigh that gap.

Is aerial crop spraying allowed in the UK and EU?

Only by exception. EU law requires member states to prohibit aerial spraying except in special cases, and the UK allows it only under an aerial spraying permit.

Can drones replace crop dusters?

Not yet for large areas. Drones carry much smaller loads, so they suit spot work and small fields. Large farms still rely on planes and helicopters for big, time-critical jobs.