Crop Spraying in Iowa County, WI by Drone for Corn, Alfalfa and Pasture

Crop spraying prices in Iowa County

Crop spraying in Iowa County, WI by drone is billed per acre, per pass, application only. Wisconsin drone rates run about $11–22 per acre in 2026, with $16 typical, and operators near the county start at $10–16. For comparison, UW Extension's latest custom rates put ground fungicide work at $12.17. Our rates:

Service	Typical rate	Notes
Alfalfa insecticide	from $13/acre	Potato leafhopper
Pasture weeds	from $13/acre	Parsnip, hemlock, thistle
Corn fungicide	from $14/acre	Tar spot, VT–R3
Soybean fungicide	from $14/acre	White mold, R1–R3
Cover crop seeding	from $15/acre	Seed billed separately

Each visit has a $250 minimum. Product is billed separately. Quotes reflect slopes, contour strips, woods and the spray volume on the label.

Beef, dairy and grain

Iowa County had 1,534 farms in the 2022 Census of Agriculture and $319 million in sales, up 54%, with livestock 55% of the total. It ranked sixth in Wisconsin for cattle.

Crop or livestock	2022
Corn for grain	71,969 acres
Hay and haylage	49,993 acres
Soybeans	44,580 acres
Corn for silage	10,155 acres
Cattle	93,830 head

The county land plan counts dairy farms down from 345 to 120 over 20 years while beef farms rose 27%. Crop spraying in Iowa County is now a mix of corn, soybean, alfalfa and pasture work.

Two sides of Military Ridge

Military Ridge splits the county. North of it, steep valleys drain to the Wisconsin River; south of it, rolling ground drains to the Pecatonica and holds the best farmland. About 49% of soils are highly erodible, and many fields are farmed in contour strips. A drone follows the strips and slopes without turning a rig on a side hill.

Tar spot in corn

UW Extension says one fungicide pass between VT and R3 provides most of the protection against tar spot, which favors temperatures in the high 60s to low 70s °F and nighttime leaf wetness. The Tarspotter app scores weather risk, but scouting still decides the call.

Soybean white mold

White mold fungicide goes on during flowering, R1–R3. UW's Sporecaster app, built by Wisconsin researchers, estimates risk from weather and canopy. Valley fields with poor air flow tend to carry the most risk.

Potato leafhopper in alfalfa

Alfalfa height	Threshold per sweep
3 inches	0.2
6 inches	0.5
8–11 inches	1.0
12 inches or more	2.0

Leafhoppers run four to five generations a season and usually drop off by mid-August. If harvest is about a week away, UW advises cutting early instead of spraying.

Pasture weeds and invasives

Canada thistle, leafy spurge and field bindweed are on Wisconsin's noxious weed list, and wild parsnip and poison hemlock are restricted invasives under NR 40. Parsnip burns skin and hemlock is toxic to livestock, so both are best sprayed as rosettes before they bolt. Drones reach hillside pastures and fence rows where tractors can't go.

Thin soils, karst and wells

Fractured dolomite and limestone often sit within 20 feet of the surface here, and the county plan rates most of the county highly susceptible to groundwater contamination; in 2018, 42% of 301 tested wells failed for coliform or nitrate. Parts of Iowa County have fallen inside Wisconsin's Atrazine Prohibition Areas, so operators check DATCP's current map before any atrazine work and map wells and sinkholes as no-spray zones.

Trout streams and state parks

The county holds about 78 miles of Class 1 trout streams, the Wisconsin River along the north line, and Governor Dodge, Blue Mound and Tower Hill state parks plus the Military Ridge State Trail. Operators map streams, parks, trails and homes as no-spray zones and check DriftWatch and BeeCheck before every job.

Cover crops on erodible ground

With nearly half of the county's soils rated highly erodible, cover crops help hold soil on slopes after corn silage and soybeans. A drone can seed winter rye or oats into standing soybeans in late August and early September, or onto silage ground right after chopping, without another trip across a side hill. Seed rates are set with your agronomist or the county land conservation office, which also knows the current cost-share options.

An Iowa County spray season

Window	Typical drone work
April to May	Parsnip and hemlock rosettes
June to August	Potato leafhopper in alfalfa regrowth
July	Soybean white mold at R1–R3
Late July to August	Corn fungicide for tar spot
September	Cover crops, fall rosettes

Wisconsin licensing

The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) requires commercial drone applicators to hold a base category such as 1.1 Field and Vegetable Crops plus the 9.9 Aerial Applicator subcategory, which covers unmanned aircraft, and to work under a pesticide business license. Iowa County Airport near Mineral Point is nearby, so operators check airspace. The FAA requires Part 107, Part 137 and a Section 44807 exemption for drones of 55 pounds or more.