Ag Drone Services in Karnes County, TX for Pasture, Hay and Huisache

Ag drone service prices in Karnes County

Ag drone services in Karnes County, TX are quoted per acre, application only. Drone operators serving the county start at $12–15 per acre, with minimums of 20–30 acres. Texas A&M AgriLife's 2026 custom rates for South Texas put aerial herbicide at $11.72 per acre and aerial brush work at $13.43. Our rates:

Service	Typical rate	Notes
Hay insecticide	from $11/acre	Armyworm, stem maggot
Pasture broadleaf herbicide	from $11/acre	Label-timed
Sorghum insecticide	from $11/acre	Sugarcane aphid
Fertilizer	from $13/acre	Liquid or dry
Huisache, mesquite and brush	from $14/acre	Spot or broadcast

Each visit has a $250 minimum. Product is billed separately. Quotes reflect brush density, well pads and pipelines, distance and the spray volume on the label.

Cattle and hay country

Karnes County had 958 farms on 389,854 acres in the 2022 Census of Agriculture, down 21% in farm count, with an average of 407 acres. Livestock brought in 84% of sales.

Crop or livestock	2022
Hay and forage	29,133 acres
Grain sorghum	1,915 acres
Wheat	583 acres
Cattle	53,100 head

Ag drone services in Karnes County are mostly pasture, hay and brush work, with sorghum and other row crops on a smaller share.

Huisache and brush

AgriLife estimates huisache covers more than 2.7 million acres of Texas rangeland, mostly in the Gulf Coast Prairies and South Texas Plains, and every pound of weeds costs 2–5 pounds of forage, up to 10. Brush Busters individual-plant treatment usually kills more than seven of ten plants, and because livestock and wildlife spread the seed, seedlings need regular follow-up. Huisache leaf sprays fit September to November. Drones spot-spray scattered plants from mapped coordinates or broadcast dense stands where labels allow.

Bermudagrass stem maggot

Bermudagrass stem maggot has been reported across Texas since 2012. It kills the top two or three leaves and leaves the field looking frosted. AgriLife says any pyrethroid labeled for bermudagrass controls it, though the best timing isn't well defined, so treatment follows scouting after each cutting.

Sorghum and sugarcane aphid

AgriLife publishes a sugarcane aphid scouting card for South-Central and West Texas, with treatment at the economic threshold. A drone treats headed sorghum without driving down rows.

Eagle Ford pads and pipelines

Karnes was the Eagle Ford's top oil-producing county in late 2024, at about 300,000 barrels a day, and the county has more than 9,800 drilled wells. Pads, flowlines, pipelines, tank batteries and flare stacks dot pastures. Operators map them as obstacles and no-spray zones and coordinate access with landowners and lease operators.

Creeks and water

Cibolo, Escondido, Ecleto, Hondo, Panther and Panna Maria creeks cross the county. Operators map creeks, stock tanks and homes as no-spray zones and check FieldWatch's DriftWatch and BeeCheck before every job.

Panna Maria and Helena

Panna Maria, settled on Christmas Eve 1854, is known as the oldest Polish settlement in the United States, and its historic district is on the National Register. Helena served as county seat from 1854 to 1894, until the railroad bypassed it; its old courthouse is now a museum. Both sit among working ranches, so historic sites and churchyards are mapped as no-spray zones.

Herbicide rules

Karnes County isn't on TDA's regulated-herbicide list, and neither are Wilson, Gonzales, DeWitt, Goliad, Bee, Live Oak or Atascosa. Product labels still set wind limits, buffers and grazing intervals.

Oil money and ranch land

Karnes, DeWitt and La Salle counties together produced 46% of Eagle Ford oil in late 2024, across a play that covers about 20,000 square miles in 23 counties. County sales-tax collections grew 21-fold after 2009 as the boom took off. Output peaked in 2015 at about 121.8 million barrels and was still 5.79 million barrels in June 2026. Many ranches now carry leases, roads and pads, which is why every spray map starts with the current pad and pipeline layout.

Field conditions

Field condition	Tractor sprayer	Spray drone
Brushy pasture	Hard to drive	Spot-sprays from the map
Pastures cut by pipelines	Detours, crossings	Flies over
Hay close to cutting	Crushes the stand	No crop contact
Clay after a rain	Ruts	No soil contact

A Karnes County spray year

Window	Typical drone work
March to May	Spring broadleaf weeds
April to June	Sugarcane aphid scouting in sorghum
June to September	Stem maggot after cutting, armyworm
September to November	Huisache leaf sprays

Texas licensing and local help

The Texas Department of Agriculture (TDA) requires a Commercial Applicator license, $200 a year, with the Aerial Application category plus another use category. The FAA requires Part 107, Part 137 and a Section 44807 exemption for drones of 55 pounds or more. Kenedy Regional Airport sits just northwest of Kenedy. The AgriLife Extension office at 210 W. Calvert Avenue in Karnes City helps landowners with weed identification, range management and pesticide training.