Orchard Spraying with Drone – Protection of Fruit Trees
Fruit growing is an important sector of Bulgarian agriculture. Apples, cherries, peaches, apricots, plums, pears – fruit trees are grown throughout the country and require systematic plant protection. Traditional spraying with ground machinery or hand sprayers has its limitations – it is slow, does not provide full coverage of the crowns and compacts the soil.
Orchard spraying with a drone is a modern solution that overcomes these problems. The drone sprays from above, providing excellent coverage of leaves and fruit, reaches difficult terrain and works significantly faster. In this article you will learn how drone technology helps with effective protection of orchards.
Why Orchards Need Drone Spraying
Crown Coverage from Above
The greatest advantage of drone spraying for fruit trees is coverage from above. Ground sprayers spray from the sides and upwards, but the upper part of the crown often remains insufficiently treated. Yet it is precisely there that diseases and pests find ideal conditions.
The DJI Agras T50 sprays downward, and the powerful airflow from the rotors presses the preparation deep into the crown of the trees. The result is significantly better coverage of all parts of the tree – upper branches, inside of the crown and even the underside of leaves.
Work on Hilly Terrain
Many orchards in Bulgaria are situated on hilly and sloped terrain – especially in Kyustendil, Troyan, the Rhodopes and the Balkan Range area. Working with heavy machinery on a slope is difficult and risky. The drone flies above the terrain and is not affected by the slope – it treats flat and mountain orchards equally effectively.
Zero Soil Compaction
The root system of fruit trees is sensitive to soil compaction. Repeated heavy machinery passes between rows damage surface roots and worsen water balance. With drone spraying the soil remains untouched.
Access to Difficult Places
In old orchards with irregularly placed trees or in orchards on steep slopes, ground machinery simply cannot enter. The drone has no such limitation – it reaches everywhere.
Main Diseases and Pests on Fruit Trees
Apples and Pears
- Scab (Venturia inaequalis) – the most common disease, causes spots on leaves and fruit
- Powdery mildew – white coating on leaves and shoots
- Codling moth (Cydia pomonella) – larvae penetrate the fruit
- Aphids – deform leaves and shoots
- Apple blossom weevil – damages flower buds
Cherries and Sour Cherries
- Monilia (brown rot) – causes fruit rot and blossom blight
- Cylindrosporium (cherry leaf scorch) – early leaf drop, weakens trees
- Cherry fly – larvae develop inside ripening fruit
Peaches and Apricots
- Peach leaf curl (Taphrina deformans) – deformation of leaves
- Monilia – very widespread in wet weather during flowering
- Peach leaf roller – damages leaves and shoots
Plums
- Plum moth – larvae feed on the flesh of the fruit
- Plum rust – yellow spots on the underside of leaves
- Plum pox (PPV) – viral disease with fruit deformation
How Orchard Spraying with a Drone Works
Preliminary Assessment
The AirAgro team visits the orchard or discusses its characteristics with you – tree type, age, layout, main problems. A treatment plan is prepared.
Orchard Mapping
GPS coordinates are entered into the drone system. Boundaries, rows, tree height and spraying parameters are determined. Where needed, avoidance zones are set (buildings, water bodies, roads).
Drone Calibration
Flight height, speed and dosage are set according to the specific orchard. With fruit trees the drone typically flies at 2–4 metres above the crowns. The DJI Agras T50 automatically adapts its height to the terrain relief thanks to its radar system.
Spraying
The drone follows the pre-set route. The preparation is dispersed with fine droplets, and the airflow from the rotors provides deep penetration into the crown. Under standard conditions spraying 10 decares of orchard takes about 15–20 minutes.
Documentation
After treatment the grower receives information about the treated areas, parameters used and working conditions.
For full service information see drone spraying services.
Advantages of Drone Spraying in Orchards
Better Crown Coverage
Scientific studies show that drone spraying provides 20–30% better coverage of the upper crown compared to ground turbine sprayers. This means more effective protection exactly where it is most needed.
Significantly Faster
The drone treats an orchard many times faster than manual or ground spraying. A larger orchard (50–100 decare) is treated in 2–4 hours, while conventional methods may take an entire day.
Less Water Consumption
The DJI Agras T50 works with 1–3 litres of solution per decare in orchards (compared to 80–150 litres with conventional spraying). Less water means more concentrated preparation and often better adhesion to the leaf surface.
Worker Safety
With manual spraying workers are in direct contact with chemicals. The drone eliminates this risk – the operator stands at a safe distance.
Flexibility with Different Crops
The drone is easily adjusted for different types of fruit trees – from low-intensity apple orchards to tall cherry trees. Spraying parameters are adapted for each species.
When to Spray Orchards – Calendar
Winter Spraying (February – March)
Before bud break, copper preparations and mineral oils are applied. This treatment destroys overwintering forms of diseases and pests.
Spring Treatment (April – May)
At bud break and during flowering – fungicide treatments against scab, monilia and leaf curl. Note: insecticides are avoided during flowering so as not to harm pollinators.
Post-Bloom Treatment (May – June)
Combined treatments with fungicides and insecticides. Fighting codling moth, aphids and diseases. The drone enables timely response under conditions favourable for diseases.
Summer Protection (July – August)
Continued treatment against pests and diseases. With cherries and peaches – protection before and during ripening. Observing pre-harvest intervals.
Autumn Treatment (October – November)
Copper spraying after leaf fall to reduce disease inoculum for the following year.
Fruit Growing in Bulgaria – Context
Bulgaria has a long tradition in fruit growing. The Kyustendil region is known for its apples and cherries, Troyan for pears and plums, Plovdiv and Pazardzhik for peaches and apricots. In recent years modern intensive orchards with drip irrigation and anti-hail nets have also been developing.
These modern orchards need modern plant protection methods. Drone spraying fits perfectly into the concept of precision agriculture and complements investments in modern technologies.
For more information about the benefits of drones in agriculture, read our detailed analysis.
Practical Tips for Fruit Growers
Plan Treatments in Advance
Prepare an annual plant protection plan in accordance with the phenological phases of the trees. Contact AirAgro in advance to ensure timely service.
Combine Preparations
Where possible, combine fungicide + insecticide + foliar fertilizer in one pass. This saves time and costs.
Observe Pre-Harvest Intervals
Especially important with cherries and peaches that ripen earlier. Inform the AirAgro team about the planned harvest date.
Monitor the Orchard
Regular inspection helps with early identification of problems. Use pheromone traps to monitor codling moth and other pests.
Price of Orchard Spraying with a Drone
The price depends on the size of the orchard, type of trees, terrain and number of treatments. For current information on drone spraying prices, contact us.
With orchards, drone spraying is especially economical, as it saves significant manual labour and provides better coverage, leading to healthier trees and better quality harvest.
Vineyards and Orchards – Similar Approach
If besides an orchard you also have vineyards, AirAgro serves both types of plantation. Read more about vineyard spraying with a drone and learn how the drone handles vine plots.
Frequently Asked Questions
Can the drone spray tall trees?
Yes. The DJI Agras T50 maintains an automatically set height above crowns and can treat trees of different heights. The drone's radar system adapts flight height in real time.
Is drone spraying safe for the fruit?
Absolutely safe. The drone applies the preparation in the same way as conventional sprayers, just from above. It is important to observe the pre-harvest intervals of preparations – regardless of the method of application.
Is the drone effective with dense orchards?
Yes. With dense intensive orchards the drone's airflow is especially useful – it penetrates between trees and provides coverage from all sides. The drone can be adjusted for different row spacing.
What is the minimum orchard size for drone spraying?
AirAgro treats orchards of any size. Even small orchards of 3–5 decares can be treated effectively.
Order a Free Consultation for Orchard Spraying with a Drone
Your fruit trees deserve the best protection – from winter spraying to the last treatment before harvest. Plan the season in advance with AirAgro!
What we offer to fruit growers:
- Free consultation and farm inspection – our team will visit your orchard and assess the condition of trees, terrain and treatment needs
- Annual treatment plan – a detailed calendar with all necessary treatments, tailored to tree types and phenological phases
- Drone demonstration of the DJI Agras T50 – see on-site how the drone covers crowns from above with 20–30% better results than ground turbine sprayers
- Work on hilly terrain – no limitations from slope and relief
Contact us:
- 📞 Call us at +359 884 242 406 for a free consultation
- 🌐 Visit airagro.bg and request a farm inspection
- 📋 Request drone spraying services for your orchard
The first step is free – call and request a consultation and inspection of your orchard. Together we will prepare an annual treatment plan that will protect your trees and ensure quality produce!
