Drone Spraying in Polk County, Missouri for Pasture and Hay

Polk County drone spraying prices for pasture and hay

Drone spraying in Polk County, Missouri is quoted per acre for one pass, application only. Livestock, poultry and dairy bring in 89% of farm sales here, and hay and haylage cover more than 68,000 acres. Pasture weed and brush work is the main job, and these rates are built around it.

Service	Typical rate	Notes
Pasture broadleaf herbicide	from $13/acre	Thistle, poison hemlock and summer weeds
Sericea lespedeza control	from $14/acre	June–September window
Fescue seedhead suppression	from $13/acre	Boot stage in spring
Fall armyworm insecticide	from $13/acre	Hay and pasture, same-day after scouting
Brush and multiflora rose spot spraying	from $18/acre	Higher volume along fence rows and draws

Product is billed separately, or the rancher supplies it. Missouri drone rates average about $15.50 per acre for 2026, and University of Missouri Extension puts typical custom hire near $16. Pasture specialists in southwest Missouri quote $12–20. The final price depends on water volume, brush density, terrain, timber edges and power lines, and travel distance. Neighbors who book together cut the travel cost. The minimum charge is $225 per visit.

Polk County cattle country in numbers

Measure	Polk County, MO (2022 Census)
Farms / land in farms	1,380 farms / 340,780 acres
Average farm size	247 acres
Livestock, poultry and products share	89% of sales
Cattle and calves	$53.75M, 5th in Missouri; 110,005 head
Poultry and eggs	$33.78M, 17th in Missouri
Milk	$7.43M, 9th in Missouri
Hay and haylage / soybeans	68,280 / 9,302 acres

With 110,000 head of cattle on the county's grass, weed control is really grazing management. Every pasture herbicide carries grazing and haying intervals, and lactating dairy cows often have stricter limits than beef cattle. Operators match the product to the herd before they mix.

Drone, boom or airplane on Polk County grass

• Boom sprayers work well on open, flat hayfields, but slow down on rocky slopes, wooded draws and pastures cut by creeks draining to the Pomme de Terre and Little Sac.
• Airplanes need large open blocks. Polk County's average pasture is broken up by fence rows, ponds and timber edges.
• Drones follow the terrain at 8–15 feet and can switch between broadcast and spot mode. A pasture with scattered thistle or sericea patches gets only the patches treated, which saves product on lightly infested ground.

Drone spraying sericea lespedeza from June to September

The Missouri Department of Conservation lists PastureGard (triclopyr + fluroxypyr) as the most effective and economical sericea treatment. It works best once plants reach 12 inches, usually from June 1 through September 30. Metsulfuron and triclopyr are alternatives. A pre-emergent imazapic pass fits from the last week of March to April 15. MDC found 2,4-D ineffective on sericea. The seed bank keeps sprouting, so control takes four to five years of follow-up. A drone-mapped patch file makes each year's pass faster and cheaper.

Poison hemlock and Missouri's noxious weeds

MU Extension recommends treating poison hemlock at the rosette stage, before it bolts and flowers, with 2,4-D, dicamba, or 2,4-D plus triclopyr. Every part of the plant is toxic. It can cause crooked calf syndrome, and it stays dangerous when baled into hay.

Missouri's noxious weed list includes 12 species. Pasture-relevant ones are:

• musk, Scotch and Canada thistle
• multiflora rose
• Johnsongrass
• spotted knapweed
• common and cutleaf teasel
• field bindweed

Spring rosette passes for thistle and hemlock, then summer spot work on rose and teasel, keep a Polk County pasture compliant.

Fescue seedheads and toxic K-31

Most Polk County grazing is tall fescue, and much of it is toxic K-31. MU forage specialists link the ergot alkaloids in K-31 to steady losses in cows and calves. Suppressing seedheads in spring, when the grass is at boot stage, keeps cattle grazing leaves instead of toxic seed heads. MU trials found metsulfuron-based treatments cut seedheads from about 260 to 9 per square meter, though they also reduced total grazing days. Clover in the stand is very sensitive to these products, so the decision depends on how much legume the pasture carries.

Fall armyworm in hay and pasture

MU Extension's threshold is three or more half-inch larvae per square foot. Check 10 spots per field. Larvae longer than 1.5 inches are close to pupating and rarely worth spraying. Arkansas has found pyrethroid resistance, so a non-pyrethroid insecticide class is the safer choice. Armyworms migrate north from the Gulf and can strip new bermudagrass or fescue regrowth in days. Drone treatment the morning after scouting saves the next cutting.

Pomme de Terre, Stockton Lake and karst ground

Pomme de Terre Lake covers about 7,820 acres at normal pool across Hickory and Polk counties, fed in part by Lindley Creek out of eastern Polk County. Stockton Lake, about 24,900 acres, reaches into southwestern Polk County, fed by the Sac and Little Sac rivers. Missouri also has more than 16,000 sinkholes, 4,400 springs and many losing streams that drain straight into groundwater. Operators treat sinkholes, springs and pond edges as no-spray zones, keep label setbacks from water, and choose products labeled for use near it.

Missouri runs a FieldWatch registry for sensitive crops and apiaries. Operators check it, along with local knowledge of gardens and hives, before every flight.

Airports around Bolivar

Bolivar Municipal Airport (M17) sits about 4 nautical miles east of town, with a 4,000-foot runway and local traffic. Springfield-Branson National Airport, with Class C airspace, is roughly 25 miles south of Bolivar. Fields in the southern part of Polk County near Pleasant Hope may need an FAA airspace check before the flight.

Missouri licensing for drone pasture work

Since January 1, 2025, the Missouri Department of Agriculture has required Category 13, Aerial Pest Control, for commercial and noncommercial applicators who apply by aircraft, including drones. It is held alongside a use category such as 1A or the pasture-relevant categories. Existing license holders add Category 13 at their next recertification. Ranchers spraying their own land by drone with restricted-use products need Category 23, Aerial, which builds on Category 20. Operators also need FAA Part 107 and Part 137 certificates, and a Section 44807 exemption for drones over 55 pounds.