Crop Spraying in Whitman County, Washington

Crop spraying rates in Whitman County

Crop spraying by drone in Whitman County, WA is priced per acre for one pass, application only. You buy the product through your grain co-op or fieldman, and a WSDA-licensed operator applies it at label rate.

Service	Typical rate	Notes
Wheat fungicide & herbicide	from $14/acre	stripe rust, grass weeds
Chickpea, lentil & pea fungicide	from $15/acre	Ascochyta blight
Pulse desiccation	from $15/acre	lentils and peas before harvest
Canola insecticide	from $15/acre	cabbage seedpod weevil, flea beetles
Barley passes	from $14/acre	rust, aphids
Steep-slope & small-field work	from $16/acre	hilltops, draws, scab ground

Washington drone spraying typically runs $14–$22 per acre for wheat, corn, canola and hay, with a state typical figure near $17, and one regional operator starts at $15. Our starting rates sit at the low end of that range. Price depends on acres, gallons per acre, slope, field shape, power lines and homes, and travel from Colfax. Small fields are billed at a 20-acre minimum.

Farming on the Palouse

Whitman County covers the heart of the Palouse, a region of rolling loess hills in southeast Washington, and it is one of the largest wheat counties in the country. The USDA 2022 Census counts 933 farms on about 1.22 million acres, averaging 1,306 acres, with about 943,400 acres of cropland. Wheat covers about 498,500 acres. Chickpeas follow at about 69,400 acres, canola at 46,300, barley at 25,600 and lentils at 22,800. Crops make up about 96% of farm sales.

Crop	Common targets	Typical drone window
Winter & spring wheat	Stripe rust, downy brome, Italian ryegrass, mayweed chamomile	April–June
Chickpeas	Ascochyta blight, pea aphid	June–July
Lentils & dry peas	Pea leaf weevil, pea aphid, desiccation	May–August
Canola	Cabbage seedpod weevil, flea beetles	April–June
Barley	Rust, Russian wheat aphid	May–June

Steep Palouse hills in Whitman County

Palouse slopes are among the steepest farmed ground in the country, and hilltops, draws and north-facing slopes often need different treatment. Big self-propelled sprayers slow down on side hills, and fields shaped by hills leave many point rows. Drones follow the terrain at a steady height and spray only where needed.

• Hilltop and slope zones treated separately from bottoms.
• Draws and waterways sprayed or skipped as mapped.
• No wheel tracks on erodible loess soils in spring.

Stripe rust in wheat

Stripe rust is the main wheat disease on the Palouse, and cool, wet springs can cut yields sharply on susceptible varieties. Washington State University issues regular rust forecasts in spring. When a forecast or field scouting calls for fungicide, many fields need treatment in the same short window, and drones add capacity when ground rigs and airplanes are booked.

Chickpeas, lentils and peas

Whitman County grows much of the country's chickpeas and lentils in rotation with wheat around Colfax, Pullman, Palouse, Colton and Uniontown. These crops are short, and ground rigs crush plants late in the season.

• Ascochyta blight fungicide in chickpeas, often in repeat passes during wet weather.
• Pea leaf weevil and pea aphid control in lentils and peas.
• Pre-harvest desiccation so lentils and peas dry evenly for the combine.

Canola in the rotation

Canola acres have grown on the Palouse as a break crop for wheat. Cabbage seedpod weevil arrives at bloom, and flea beetles hit seedlings. Bloom sprays are timed for pollinators, often late in the day, and drones reach yellow fields without knocking down pods.

Pullman airport, WSU and the Idaho line

Pullman–Moscow Regional Airport sits just outside Pullman, and the controlled airspace around it covers nearby farmland. Washington State University research fields and test plots are mapped as no-spray areas unless the operator is hired for them. Many farms also run across the Idaho line, so operators check that licenses cover both states before the flight.

Snake River and Palouse River buffers

The Snake River forms the county's southern border, and the Palouse River, Union Flat Creek, Rebel Flat Creek and many seasonal draws drain the hills. Labels require buffers from water, and some products have extra stream buffers for salmon habitat. Drones hold mapped buffers precisely.

Spray calendar for Whitman County

Months	Typical jobs
March–April	Grass and broadleaf weeds in winter wheat; canola flea beetles
May	Stripe rust fungicide; pea leaf weevil; canola seedpod weevil at bloom
June	Second rust pass; chickpea Ascochyta; spring wheat herbicides
July	Chickpea fungicide; pulse aphids
August	Lentil and pea desiccation

Why Whitman County growers use drones

• Steep slopes handled at a steady height.
• Extra capacity in the rust window.
• No crop damage in short pulse crops late in the season.
• Spot treatment of hilltops, patches and field edges.
• Precise buffers along streams, homes and towns.

Washington licensing for drone spraying

The Washington State Department of Agriculture (WSDA) licenses pesticide applicators. Anyone spraying for hire by drone needs a commercial applicator license with the aerial category, and aerial application equipment must also be licensed with WSDA. Growers spraying their own land with restricted-use products need a private applicator license.

Federal rules require an FAA Part 107 remote pilot certificate, a Part 137 agricultural aircraft operator certificate and a Section 44807 exemption for drones over 55 pounds. If a label prohibits aerial application, the product cannot be applied by drone.

How booking works

1. Send field locations, acres, crop and what needs treating.
2. We match you with a WSDA-licensed, FAA Part 137-certified operator working in Whitman County.
3. You approve the per-acre quote and spray window.
4. The operator maps the field, applies and sends you the application record.

Communities we cover

Colfax, Pullman, Palouse, Colton, Uniontown, Oakesdale, Rosalia, Tekoa, St. John, Endicott, Garfield, LaCrosse and Albion, plus farms along the Spokane, Lincoln, Adams, Franklin, Garfield and Asotin county lines.