Ag Drone Spraying in Brookings County, South Dakota

Ag drone spraying rates in Brookings County

Ag drone spraying in Brookings County, South Dakota is priced per treated acre, application only, with the product billed separately. South Dakota operators typically quote $8 to $18 per acre for one pass, and operators serving the county publish ranges of $10–$17 and $10–$18. The starting rates below come from FAA Part 137-certified, state-licensed operators covering Brookings, Volga, Elkton, White, Aurora and Bruce.

Service	Typical rate	Notes
Corn fungicide or insecticide	from $11/acre	Leaf diseases, rootworm beetles
Soybean fungicide or insecticide	from $11/acre	Aphids, white mold
Alfalfa insecticide	from $11/acre	Weevil, leafhopper between cuttings
Small grain fungicide	from $11/acre	Head scab, rust
Cover crop seeding	from $13/acre	Rye or mixes, seed separate

Price factors: total acres, gallons per acre on the label, field size and shape, wetlands and shelterbelts, and travel between farms. Most operators set a minimum of about 40 acres or a flat visit charge near $350. Fields over 160 acres and multi-field orders for the same pass usually earn a lower per-acre rate. Product can come from your co-op or be supplied by the operator.

Brookings County crop programs

The USDA 2022 Census of Agriculture counts 801 farms on 374,488 acres in Brookings County, with corn on 109,129 acres and soybeans on 98,053. Hay covers about 29,000 acres and silage corn 13,751, feeding nearly 79,000 cattle and close to 120,000 hogs. The average farm is 468 acres.

Crop	Main targets	Drone window
Corn	Northern corn leaf blight, gray leaf spot, rootworm beetles at silking	VT–R2, late July
Soybeans	Soybean aphid, white mold	R1–R3, July to mid-August
Alfalfa	Alfalfa weevil, potato leafhopper	Before first cutting; regrowth
Spring wheat and oats	Fusarium head blight, rust	Heading, late June–early July

SDSU Extension, based in Brookings, publishes pest and disease updates through the season, and operators time passes to those alerts and to your scouting. Soybean aphid is the most common reason for a drone pass on Brookings County soybeans, because populations can reach threshold quickly in late July heat.

Corn rootworm beetles and silk clipping

Where corn follows corn, adult rootworm beetles can clip silks during pollination. A drone insecticide pass at silking protects pollination without driving through a full canopy, and the same visit can include a fungicide if leaf disease is building. Scouting for beetles on silks in late July tells you whether the pass is worth it.

Prairie potholes, shelterbelts and the Big Sioux

Brookings County fields are broken up by prairie pothole wetlands, shelterbelts, lakes such as Oakwood Lakes and Lake Campbell, and the Big Sioux River corridor. These features make ground and manned aerial spraying awkward:

• wet spots and sloughs are flown over without getting a sprayer stuck;
• mapped no-spray buffers keep product off wetlands, lakes and the river;
• shelterbelt edges are treated with a safe set-back instead of being skipped;
• irregular field boundaries are flown on an exact route with no overlap or skips.

How drone spraying works in Brookings County

1. Send field details: location, acres, crop, growth stage and the target pest, disease or seeding job.
2. Mapping: the operator outlines each field and marks wetlands, shelterbelts, homes, power lines and bins.
3. Scheduling: a calm, rain-free window that fits the label and crop stage is booked.
4. Application and record: RTK-guided passes are flown, and you receive treated acres, product, rate and weather data.

Spray days on the open prairie

Wind is the main limit on spraying in eastern South Dakota. Operators fly early mornings and evenings, avoid calm overnight inversions and gusty afternoons, and use coarse droplets and drift-reducing nozzles. Because a drone needs no airstrip and little setup, crews can move quickly when a calm window opens, and a list of ready fields helps use each one. Shelterbelts and low areas can shelter a field from wind on days when open ground is too gusty, so operators often start with those fields first.

Livestock farms, silage and cover crops

Brookings County's cattle feeders and hog farms raise silage corn, alfalfa and hay, and spread manure on many fields. Drones support these farms by treating alfalfa between cuttings without wheel traffic on regrowth, and by seeding cereal rye into standing corn or soybeans in late August and September, before harvest. Rye seeded this way holds manure nutrients over winter, protects soil from spring runoff and can be grazed in spring. Typical rates are 50–90 lbs of rye per acre.

Irrigated fields

About 21,000 acres in the county are irrigated. Drones treat pivot corners and dryland edges that chemigation does not reach, and they fly over wet pivot tracks without leaving ruts. Many Brookings County growers chemigate the circle and fly the corners in the same week, so the whole field gets the same timing. Each pivot circle and corner is mapped as its own zone, so you are billed only for the area actually treated.

South Dakota licensing for drone application

Every operator holds an FAA Part 107 remote pilot certificate and a Part 137 agricultural aircraft operator certificate, plus a Section 44807 exemption for drones over 55 lbs. In South Dakota, applying pesticides for hire by air requires a commercial applicator license from the South Dakota Department of Agriculture and Natural Resources (DANR) with the aerial application category. The SDSU Extension office in Brookings County offers applicator training and crop advice.