Ag Drone Services & Crop Spraying in Washington County, TN

Ag drone spraying rates in Washington County, TN

Ag drone services in Washington County, TN are quoted per acre for a single pass, application only. You or your co-op supply the product, and an FAA Part 137-certified, state-licensed operator applies it at 2–5 gallons of carrier per acre. These 2026 starting rates cover the hayfields, pastures and row-crop ground between Jonesborough, Gray, Telford and Limestone.

Service	Typical rate	Notes
Pasture & hayfield weed control	from $12/acre	Thistles, ironweed, buttercup, horsenettle
Corn & soybean fungicide	from $13/acre	VT–R1 corn, R3 soybeans
Insecticide passes	from $13/acre	Armyworms, stink bugs, aphids on threshold
Tobacco & specialty crops	from $16/acre	Smaller blocks, tighter flight plans
Cover crop & pasture seeding	from $14/acre	Broadcast after harvest or into thin stands

The rate depends on carrier volume (a 5 GPA fungicide pass needs more tank loads than a 2 GPA herbicide pass), field size and shape, slope, tree lines and power lines, and how far the mixing point is from the field. Because many farms here are small, the minimum is $350 per visit rather than an acreage floor. Fields under about 15 acres are routed together with neighboring jobs on the same day so each grower pays for treated acres, not for drive time.

How agricultural drone spraying works

A spray drone is a heavy-lift aircraft with a liquid tank, a pump, and nozzles or rotary atomizers under the rotors. The flight is planned on a map before takeoff and flown on RTK GPS, so passes are straight, evenly overlapped and stop at the field boundary.

• Field mapping. The boundary, no-spray zones and obstacles are drawn first; the drone follows that plan, not a pilot's eye.
• Low, steady flight. The aircraft holds a set height above the canopy, and rotor downwash pushes droplets into the leaves and lower canopy.
• Low carrier volume. Most labels allowing aerial use run 2–5 gallons per acre, far less water than a ground boom.
• Battery and tank swaps. The drone returns to the mixing trailer, reloads and resumes exactly where it stopped.
• The label rules the job. Carrier volume, droplet size, wind limits, buffer zones, re-entry interval and preharvest interval all come from the EPA-approved label.

Pasture and hayfield weed control

Forage is the biggest crop in Washington County by a wide margin: the 2022 Census of Agriculture counted about 36,000 acres of hay and haylage, compared with roughly 2,100 acres of corn for grain. That makes pasture and hayfield weed control the core of drone spraying in Washington County.

The weeds that cost local cattle and hay operations the most are musk and bull thistle, tall ironweed, buttercup, horsenettle, multiflora rose and blackberry along fencerows. Timing matters more than product:

• Buttercup: late winter to early spring, before bloom.
• Thistles: rosette stage in fall or early spring, before bolting.
• Tall ironweed and horsenettle: early summer, on active growth.
• Brush and multiflora rose: full leaf, early to mid summer.

Drones handle the steep, rocky and wet hayfields that are hard to cross with a tractor and boom, and spot-spray mode treats patches without covering clover across the whole field. Fall armyworm outbreaks in late-summer hay and fescue can be treated fast when a field hits threshold.

Corn, soybean and tobacco programs

Crop	Common targets	Typical drone timing
Corn (grain and silage)	Gray leaf spot, southern rust, foliar nutrients	VT to R1, July
Soybeans	Frogeye leaf spot, stink bugs, defoliating caterpillars	R3, late July to August
Burley tobacco	Foliar diseases and insects listed on the label	Through the growing season, as scouted
Small grains	Broadleaf weeds, head diseases	Spring tillering to heading
Cover crops	Wheat, cereal rye, clover seeding	After corn silage or soybean harvest

Tall corn at tassel is where drone work in Washington County pays off most: a ground rig cannot get through without knocking stalks down, and a plane or helicopter is rarely booked for a 20-acre bottom field along the Nolichucky River.

Built for small, steep and tree-lined fields

Washington County had 1,288 farms in 2022 with an average size of 76 acres, and more than half of them farm between 10 and 49 acres. Fields are broken up by woodlots, creeks, homes and power lines, and the ground rises toward the ridges along the county's southern edge.

Those conditions are where drone crop spraying beats other methods. The aircraft flies around trees and utility lines on a pre-set path, treats hillsides without the rollover risk of a tractor, and works river-bottom fields that stay wet after spring rain. Short setup time also means a handful of small fields near Fall Branch, Gray or Boones Creek can be covered in one morning.

Drone vs ground rig vs helicopter

Factor	Spray drone	Ground boom	Helicopter / plane
Soil compaction and crop damage	None	Wheel tracks, ruts on wet ground	None
Wet or flooded fields	Yes	Often has to wait	Yes
Small or odd-shaped fields	Well suited	Slow turns, more overlap	Rarely economical
Steep slopes	Yes	Limited by safety	Yes
Water per acre	2–5 gallons	10–20 gallons	2–5 gallons
Tall corn at tassel	Yes	Usually not	Yes
Best fit	5 to several hundred acres	Large, flat, dry fields	Large blocks, heavy demand

For most farms in Washington County, the drone is the practical middle option: aerial coverage without the minimum acreage that manned aircraft need.

Tennessee rules for drone applicators

Anyone who sprays crops by drone for hire in Washington County needs both federal and state credentials:

• FAA Part 107 remote pilot certificate for every pilot.
• FAA Part 137 agricultural aircraft operator certificate.
• Section 44807 exemption for drones over 55 lb, which covers most spray drones.
• Tennessee Department of Agriculture commercial applicator certification with the aerial category exam, plus the category for the crop being treated.
• Liability insurance and drone registration with TDA. Tennessee State University Extension guidance lists coverage of at least $100,000 and a TDA decal on the aircraft.

Ask the operator for copies of these documents before the first job, and keep them with your spray records.