Ag Drone Spray in Minnehaha County, SD for Corn, Soybeans and Alfalfa

Ag drone spray rates in Minnehaha County

Ag drone spray work in Minnehaha County, South Dakota is priced per acre for application only. Product is billed at cost, or you supply it. Published South Dakota drone rates run $8–18 per acre, with a 2026 typical of about $13, and statewide directories quote $12–16 for row crops.

Service	Typical rate
Corn and soybean herbicide	from $12/acre
Corn fungicide (tar spot, rust)	from $12/acre
Soybean fungicide or aphid insecticide	from $12/acre
Alfalfa weevil passes	from $12/acre
Cover crop seeding	from $13/acre

What changes the price: acres per trip, how scattered the fields are, shelterbelts and wires, gallons per acre on the label, and whether the field sits in controlled airspace near Sioux Falls. Each visit has a $300 minimum.

Minnehaha County farm numbers

The 2022 USDA Census of Agriculture counts 995 farms on 325,498 acres in Minnehaha County, averaging 327 acres. Sales reached $391.4 million, fourth in South Dakota, split almost evenly between crops (51%) and livestock (49%). Milk sales rank second in the state, and the county carries about 73,000 cattle and 32,400 hogs.

Crop	Acres (2022)
Corn for grain	104,774
Soybeans	96,698
Forage (alfalfa and hay)	25,806
Corn silage	9,418
Wheat	1,156

An SDSU survey of 595 eastern South Dakota corn and soybean farmers found 25% use drones and 13% use them to apply inputs. Battery life on application drones runs 7–12 minutes, so good loading logistics matter as much as the aircraft.

Tar spot and southern rust in Minnehaha corn

SDSU Extension first found tar spot in Minnehaha County in late August 2024, when it turned up in 46 South Dakota counties, and confirmed it again in the county in 2025. Southern rust, gray leaf spot, northern corn leaf blight and Goss's wilt are also on the list. SDSU uses a 30% leaf-disease incidence threshold for southern rust, and yield loss is possible when disease is severe at or before R3. A drone sprays fungicide over tasseled corn without crushing rows, and it is not slowed by soft ground after an August storm.

White mold, soybean aphid and SCN

White mold

SDSU recommends fungicide at R1. Risk rises in cool (under 80°F) wet weather, at populations above 160,000 seeds per acre and on manured ground, which is common near Minnehaha County dairies.

Soybean aphid

The SDSU threshold is 250 aphids per plant. Spraying stops paying once beans reach R6. In 2025, parts of eastern South Dakota went over threshold.

Soybean cyst nematode

SCN is present in every South Dakota county east of the Missouri River. Foliar sprays cannot fix it, but SCN-stressed beans are hit harder by aphids and disease, which makes scouting and timely foliar passes more valuable.

Alfalfa weevil on dairy forage

With milk ranked second in the state, alfalfa matters in Minnehaha County. SDSU's 2026 weevil threshold is 76 larvae per 30 stems on alfalfa up to 12 inches tall, based on a $12-per-acre application and $100-per-ton hay. SDSU has asked growers to report suspected pyrethroid failures, so product rotation matters. Cutting early can replace a spray close to first cutting. When a pass is needed, a drone leaves no wheel tracks in the stand.

Big Sioux aquifer and riparian buffers

Sioux Falls draws most of its drinking water from the Big Sioux aquifer, more than 16 million gallons a day on average and about 30 at peak. Minnehaha County protects the aquifer through a Water Source Protection Overlay District. The Big Sioux River is impaired for E. coli and sediment. The Big Sioux riparian buffer program has enrolled more than 100 stream miles and 4,000 acres, with about $11 million committed, and on Skunk Creek exceedances dropped from 50–70% of samples to about 10%. Pilots keep spray off buffer strips along the Big Sioux, Skunk Creek, Split Rock Creek and Beaver Creek, stay clear of wellheads and avoid passes ahead of heavy rain. Palisades State Park, on Split Rock Creek south of Garretson, also gets a wide margin.

Flying near Sioux Falls Regional

Sioux Falls Regional Airport (FSD, Joe Foss Field), about 3 miles north of the city, has Class D airspace with a radius of about 4.4 nautical miles. The tower and Sioux Falls Approach operate from 5 a.m. to midnight. The 114th Fighter Wing flies F-16s from the field. Fields near Sioux Falls, Brandon, Hartford and Crooks may fall inside controlled airspace and need LAANC authorization before a drone takes off. Operators check NOTAMs for military activity before every job.

Dicamba rules for 2026

South Dakota has approved Engenia, Stryax and Tavium for over-the-top use on dicamba-tolerant soybeans in 2026–2027. The cutoff is June 30 or R1, whichever comes first. A 240-foot downwind buffer and a volatility reduction agent are required. Nothing may be applied above a 95°F forecast, and on 85–95°F days only half of a county's untreated tolerant acres may be sprayed. The federal labels also prohibit aerial application, including drones. Dicamba stays with ground rigs, and the drone handles other modes of action and fungicides.

South Dakota licensing

The South Dakota Department of Agriculture and Natural Resources requires drone applicators to hold Category 17 (Aerial) plus Core and a crop category. The aerial exam is given in person through SDSU Extension. Operators also need FAA Part 107, Part 137 and Remote ID. Drones of 55 pounds or more need a Class 3 medical and an exemption. Application records must be completed by the end of each business day. South Dakota joined FieldWatch in 2018, so pilots check DriftWatch and BeeCheck before flying near specialty crops and hives.