Crop Spraying in Rice County, MN with Drones for Corn and Soybeans

Crop spraying rates in Rice County, MN

Crop spraying in Rice County, MN by drone is priced per acre for one pass, application only. Corn and soybeans cover about 182,000 acres here, alongside hog and turkey barns, dairies, nurseries and orchards. The rates below are set for that mix, on fields between the Cannon River, dozens of lakes and the edges of the Big Woods.

Service	Typical rate	Notes
Corn and soybean herbicide	from $13/acre	Post-emerge, 2–3 gallons per acre
Corn fungicide	from $14/acre	VT–R2, tar spot window
Soybean fungicide or insecticide	from $14/acre	Aphid and R3 timings
Alfalfa insecticide	from $13/acre	Between cuttings
Cover crop seeding	from $12/acre	Into standing corn or soybeans

Product is billed separately, or the grower supplies it. Minnesota drone rates run about $10–20 per acre, with $14 typical for 2026. Regional operators publish $10–18, and a central Minnesota operator lists from $15 spray and $12 seeding. The quote depends on water volume, crop height, field shape, lakeshore and woodlot edges, power lines and travel distance. The minimum charge is $300 per visit.

Rice County farms by the numbers

Measure	Rice County, MN (2022 Census)
Farms / average size	1,111 farms / 225 acres
Market value of sales	$356.8M, 39th in Minnesota, up 74%
Corn for grain / soybeans	96,895 / 84,766 acres
Hay and forage	11,080 acres
Turkeys / hogs / cattle	483,223 / 149,572 / 16,167 head
Nursery, greenhouse and sod	$21.8M, 5th in Minnesota
Fruit and berries	$2.2M, 5th in Minnesota

Rice County ranks fifth in the state for both nursery and fruit sales, and 7% of its farms sell directly to consumers. That puts orchards, nurseries, vegetable plots and market gardens right next to corn and soybean ground, which makes drift control a daily concern for crop spraying here.

How drone crop spraying works on Rice County farms

1. Confirm the need. The grower or agronomist checks pest pressure and growth stage, and the label is checked for aerial use.
2. Map sensitive edges. The operator marks shorelines, wetlands, woodlots, neighboring orchards and gardens, wires and homes.
3. Fly low. The drone works 8–15 feet above the canopy and shuts off at mapped buffers.
4. Record. The grower gets product, rate, acres, time and weather the same day.

Tar spot in southeast Minnesota corn

Tar spot was first found in Minnesota in 2019. By 2020 it was confirmed in 11 southeast Minnesota counties, and by 2021 in 23, with the southeast hit hardest. UMN advises scouting southern Minnesota corn from late June, and fungicides applied at VT–R2 reduce disease. UMN's 2025 southeast Minnesota trials showed fungicide at tassel adding as much as 39 bushels per acre under heavy pressure. Rice County growers should scout ear leaves through July. At that stage, a drone is the easiest way over 9-foot corn.

Soybean aphid and resistant waterhemp

Minnesota's soybean aphid threshold is an average of 250 aphids per plant, with more than 80% of plants infested and populations rising, through R5. In neighboring Dodge County, UMN confirmed glufosinate-resistant waterhemp in 2026. Liberty at 32 fl oz per acre gave only about 60% control there. Layered residuals and early post passes matter. Drones fit spot treatments on mapped escapes along field edges and waterways.

Cannon Wild and Scenic River and the lakes

The Cannon River runs 112 miles from Shields Lake near Shieldsville through Faribault, Morristown, Warsaw, Northfield and Dundas to Red Wing. The Straight River joins it at Faribault. Minnesota designated the Cannon a state Wild and Scenic River in 1980, from Faribault to the Mississippi. Rice County enforces it through a dedicated Wild and Scenic River zoning district. The county also holds Cannon, French, Roberds, Cedar, Mazaska, Union and many smaller lakes, and part of Sakatah Lake State Park.

Minnesota's buffer law requires a 50-foot average, 30-foot minimum vegetated strip on public waters, and 16.5 feet on public ditches. Drone flight plans map those strips as no-spray edges.

Nerstrand Big Woods and the dwarf trout lily

Nerstrand Big Woods State Park and the Cannon River Trout Lily Scientific and Natural Area protect remnants of the Big Woods forest. They are home to the dwarf trout lily, a federally endangered wildflower found in only three Minnesota counties, Rice among them. Fields bordering these woods are flown with setbacks, coarse droplets and wind blowing away from the forest. That care matters most in spring, when the lily blooms.

Groundwater, Rice Creek and cover crops

Minnesota Department of Agriculture well testing in 2017–18 found 16.7% of wells in Northfield Township initially above 10 mg/L nitrate, falling to 5.1% after follow-up. Countywide, the final figure was 1.6% of 428 wells. Northfield is updating its wellhead protection plan.

In the Rice Creek watershed, a farmer-led project started in 2018 with the county soil and water district has about 1,000 acres of cover crops. Partners report 30% less nitrate in tile water and soybean yields up 7%. Drone seeding into standing crops gets those covers established weeks earlier than drilling after harvest.

Airspace and MDA licensing

Faribault Municipal Airport sits about 3 miles northwest of town, with a 4,257-foot runway. Stanton Airfield near Dennison and Airlake to the north see regular general aviation traffic, and hospital helicopters land in Northfield and Faribault. Northern Rice County is close enough to the Twin Cities that operators check FAA airspace data before every flight.

Drone applicators need an MDA license with Category A Core, Category B General Aerial and a site category such as C Field Crops. They also need MnDOT drone registration, a MnDOT commercial operation license with insurance, FAA Part 107 and Part 137, and a Section 44807 exemption for drones over 55 pounds. Rice County lies south of I-94, so over-the-top dicamba is cut off June 12 in 2026, and the labels don't allow aerial application.