Drone Spraying for Oregon Hazelnut Orchards

Where drone spraying fits in hazelnuts

Hazelnuts are one of the clearest Oregon crops to talk about when it comes to drone spraying.

Oregon produces nearly all of the hazelnuts grown in the United States, and OSU Extension says about 1,000 Oregon farm families grow hazelnuts on almost 97,000 acres. That makes hazelnuts a serious crop here, not a side note.

Drone spraying is already being used in Oregon hazelnut orchards. Growers are looking at drones for spring disease timing, summer pest applications, wet ground, labor, and areas that are difficult to reach cleanly with ground equipment. A 2024 West Coast Nut article reported Oregon growers using drones for preventive eastern filbert blight sprays in spring and hazelnut filbertworm work in summer.

That does not mean a drone is the answer for every hazelnut acre. Air blast sprayers, airplanes, and helicopters still have their place. But in the right situations, drone application can be a useful tool in Oregon orchards.

Wet spring ground

Wet ground is one of the strongest reasons to consider drone spraying in hazelnuts.

Spring applications can line up with muddy orchard conditions. When soil is soft, running equipment through the orchard can leave ruts, compact ground, or create access problems. That is especially frustrating when the application window is tied to disease pressure or weather.

A drone applies from above, so wheel traffic is not part of the job. That can matter in March and April, when orchard floors may still be too wet for clean ground access. West Coast Nut reported this exact issue in Oregon hazelnuts, noting that wet soils can prevent ground equipment from getting into orchards during the spring window.

Drone spraying does not remove the need to watch weather. Wind, rain, temperature, humidity, label requirements, and nearby sensitive areas still matter. But when the ground is the main problem, drone application can keep an option available.

Eastern filbert blight timing

Eastern filbert blight is one of the major disease concerns in Oregon hazelnuts.

OSU Extension describes eastern filbert blight as a fungal disease that threatens hazelnut production and can be managed through pruning, fungicides, and resistant cultivars. OSU has also reported concern around new strains infecting some resistant hazelnut varieties in Oregon and Washington.

For a grower, the practical issue is timing. If a spray window lines up with wet ground, limited labor, or equipment scheduling problems, a drone may be worth considering.

The important word is may.

A drone does not replace the need for a disease management plan. It does not replace OSU Extension guidance, crop advisor recommendations, pruning decisions, resistant variety choices, or label review. It is simply another way to make an application when the product, label, orchard conditions, and timing line up.

Summer pest applications

Drone spraying may also fit some summer pest applications in hazelnuts.

West Coast Nut reported a Canby-area hazelnut grower using drone application for hazelnut filbertworm late in the season because he wanted to avoid taking an air blast sprayer through the orchard when limbs were heavy.

That is a real-world use case.

Later in the season, orchard conditions are different. The canopy is heavier, nuts are developing, and running equipment through the orchard can be less appealing. If the application is appropriate for aerial use and the timing works, a drone can give the grower another option.

Filbertworm timing still needs to be handled carefully. The Pacific Northwest Insect Management Handbook notes that proper timing of spray applications is critical for filbertworm management.

So the drone is not the strategy by itself. The strategy is timing, scouting, monitoring, product selection, and label compliance. The drone is the application tool.

Orchard edges and hard-to-reach blocks

Hazelnut orchards are not always simple rectangles with easy access.

Some blocks have tight edges, roads, power lines, buildings, oak or fir borders, wet corners, or areas where larger equipment cannot work cleanly. A drone can sometimes reach parts of an orchard that are awkward for a ground rig or difficult for a fixed-wing aircraft.

That is one of the reasons drones are getting attention in Oregon hazelnuts. In the West Coast Nut article, OSU plant pathologist Jay Pscheidt noted that drones may have an advantage where airplanes have trouble reaching, and the Canby-area grower pointed to a corner of his orchard bordered by trees as an example.

That is the kind of job where drone application can make sense: not because drones are new, but because the layout creates a real application problem.

Reducing damage from ground traffic

Ground equipment is useful and often the right tool. But there are times when driving through the orchard is not ideal.

That could be because of:

• Soft soil.
• Heavy limbs.
• Narrow access.
• Sensitive areas.
• Crop stage.
• Ruts from previous passes.
• Small blocks that are inefficient to set up for.
• Areas where turning equipment is difficult.

A drone avoids wheel traffic and can work from the air. That can be helpful when the goal is to make the application without adding another pass through the orchard.

This does not mean drone spraying gives better coverage in every situation. It means the grower has another option when ground traffic is part of the problem.

Coverage still matters

This part needs to be said plainly.

Hazelnut orchards have canopy. Coverage matters.

A drone may be useful for certain orchard applications, but it is not automatically better than an air blast sprayer. West Coast Nut reported that OSU had not yet tested drone applications in hazelnuts at that time, and OSU research comparing other air application technology with air blast sprayers found air blast did better for coverage at the top and bottom of the canopy.

That is not a reason to dismiss drones. It is a reason to use them correctly.

The product, target, water volume, droplet size, canopy density, weather, flight plan, and orchard layout all matter. Some jobs may be a good fit for drone application. Others may still be better handled by air blast, airplane, helicopter, or another method.

A serious drone applicator should be able to talk through that before the job is scheduled.

Targeted applications and scouting

One of the strongest long-term uses for drones in hazelnuts is targeted work.

Not every issue is uniform across an orchard. Some pressure starts on edges. Some blocks have wet areas. Some sections may show stress earlier than others. Some pest pressure may be concentrated in certain zones.

Drone scouting, NDVI mapping, field observations, and grower knowledge can help identify where attention is needed. From there, a spray drone may be able to treat a specific block, edge, corner, or mapped area instead of treating the whole orchard the same way.

That is where drone spraying fits the bigger precision goal.

It does not automatically mean less product. The reduction only happens when the application is targeted, the product label allows the use, and the treatment area is actually limited to the acres that need it.

Labels and licensing still control the job

A drone is just the application equipment. It does not override the product label.

Before spraying, the label needs to be checked for the crop, target pest, rate, timing, restricted-entry interval, pre-harvest interval, buffer requirements, environmental hazards, water volume, and whether aerial application is allowed. EPA says pesticide labels are legally enforceable and explain where, how, how much, and how often a product may be used.

Oregon also treats pesticide application by drone as aerial application. The Oregon Department of Agriculture says pesticide application by aircraft, including drones, requires proper aerial pesticide applicator licensing.

FAA rules matter too. The FAA says Part 137 governs the use of aircraft, including drones, to dispense or spray certain agricultural substances, including pesticides and substances for plant nourishment, soil treatment, propagation of plant life, or pest control.

For growers, the takeaway is simple: drone spraying should be treated like professional aerial application, not casual drone work.

What to send when asking about a hazelnut job

You do not need to have every detail figured out before reaching out. But the more information you can provide, the easier it is to tell what the job requires.

Helpful details include:

• Orchard location.
• Acreage or block size.
• Variety, if relevant.
• Target issue.
• Product, if already selected.
• Desired timing window.
• Whether the ground is wet or access is limited.
• Nearby homes, roads, water, livestock, or sensitive crops.
• Orchard map or rough boundary.
• Whether the goal is full-block treatment or a targeted area.

From there, the next step is reviewing the label, site conditions, timing, weather, and whether drone application makes sense for that specific orchard.

Bottom line

Drone spraying is a practical option for many Oregon hazelnut orchards, especially where wet spring ground, tight timing, orchard edges, summer access, or targeted treatments are part of the job.

It is not a replacement for good scouting, crop advisor input, label review, or smart disease and pest management. It is an application tool that can fit well when the orchard conditions and timing call for it.

For hazelnut growers, the best use of drone spraying is not about chasing new technology. It is about getting the right application done at the right time, with less ground impact and better access to the parts of the orchard that need attention.

If you are considering drone spraying for a hazelnut orchard, send the acreage, orchard location, product, target issue, and timing window. I will take a look and let you know what information is needed before scheduling.