C-DRONE GUIDE · 13 SEPTEMBER 2026

Blueberry and drone: vigor mapping, irrigation and bird-netting inspection, price

Cultivated blueberry is one of the fastest-growing fruit crops in France: around 600 hectares planted and a 2025 harvest announced at a record level, on the order of 3,300 tonnes, driven by new orchards opening every year — up to 50 additional hectares a year over the last three seasons. That growth changes what growers actually need: most French plots are still young, still in their establishment phase, exactly the moment when uneven plant survival or a shortfall in irrigation costs the most to fix once it is caught late. A drone offers three concrete, complementary uses here: mapping young plants' vigor to target replanting, spotting water-stress zones on a shallow, demanding root system, and checking the integrity of bird-netting over areas now too large for an exhaustive walk-through. Here is what research shows about these three uses, what a drone does not measure, and prices observed in 2026.

Published on 13 September 2026, reviewed on 14 September 2026 — regulations in force as of September 2026.

A young, fast-growing industry: what that means for monitoring

Cultivated blueberry remains a recent crop on the scale of French agriculture. According to Chambre d'agriculture France and the trade press, the 2025 harvest is expected to reach a record level of around 3,300 tonnes, on a surface area that has reached 600 hectares — with close to 50 hectares planted every year for the past three years. Occitanie and Provence-Alpes-Côte d'Azur form the leading basin, at around 60% of national production, or roughly 2,100 tonnes; a second basin brings together Pays de la Loire, Brittany and Centre-Val de Loire. Sologne illustrates this momentum well: a grower in Loir-et-Cher already runs 26 hectares of production plus 3 hectares of nursery at its Bauzy site, and has just acquired 50 more hectares in the municipality of Cerdon.

This expansion shifts where monitoring pays off: unlike a walnut or olive orchard already established for decades, most French blueberry plantations are either freshly planted or entering their first years of production — the period when uneven plant survival or a localised water shortfall is easy to fix if caught early, and costs years of yield otherwise. A regular flyover, on surfaces growing by dozens of hectares from one season to the next, becomes a steering tool rather than an occasional luxury.

Vigor mapping to steer young plants' establishment

A multispectral flight produces, from indices such as NDVI, NDRE or ENDVI, a vigor map that distinguishes within minutes the uniform planting zones from the sectors with slowed growth — useful for targeting replanting, adjusting fertilisation, or checking that a new block planted at Cerdon or elsewhere is establishing evenly. The method draws on research carried out on blueberry itself: K. E. Anku, D. C. Percival and L. R. Raj, of the Wild Blueberry Research Program at Dalhousie University in Canada, flew a DJI Matrice 600 Pro drone fitted with a MicaSense multispectral camera at 30 metres above blueberry fields, and published their results in Acta Horticulturae (ISHS): the NDVI, ENDVI and NDRE indices proved most reliable during the anthesis (F4/F5) and flowering (F6/F7) stages for predicting the stand's later development (see the study on Google Scholar).

One point of honesty is needed here: this study concerns North American wild blueberry (lowbush), grown in low, extensive fields in Canada and Maine, very different from French orchards of tall (highbush) bushes planted in rows. The angle is therefore widened beyond the exact French context — but the method it validates, namely using a multispectral drone to track a blueberry stand's phenology and vigor through its growth stages, remains directly transferable to a young orchard planted in France. Our guide to choosing between a multispectral and an RGB camera details that sensor trade-off, which matters on a still-low planting where RGB alone struggles to tell vegetation apart from bare soil between the rows.

Water stress: a shallow root system with little tolerance for water shortage

The blueberry bush has a fibrous, shallow root system adapted to acidic, moist soils: it tolerates irrigation swings poorly, particularly during the first two to three years after planting and while the fruit is swelling, when a localised water deficit quickly shows up as slowed growth or smaller berries. On a farm of several dozen hectares run on drip irrigation, spotting by eye, while walking the rows, the zones where irrigation is not covering the stand properly is slow and unreliable — hence the value of aerial imagery aimed squarely at this specific problem.

Catherine Chan, Daniel Hayes, Yongjiang Zhang, Peter Nelson and Bruce Hall, of the University of Maine and the company Wyman's, published a study in the journal Remote Sensing in 2021 that goes directly in this direction: a visible and near-infrared imaging spectrometer mounted on a drone flew over blueberry fields in Maine, and the spectral data collected, coupled through machine learning with leaf water potential measurements taken on the ground, was used to build a model predicting water-stressed zones at plot scale (DOI 10.3390/rs13081425, see the study on Google Scholar). This study, too, concerns Maine's wild blueberry — the same context caveat as for vigor mapping — but confirms the principle works on this species: in French commercial practice, a thermal camera remains the most accessible tool for approaching this same water-stress diagnosis, along the same lines our guides on thermography applied to vineyards and orchards detail for other perennial crops.

Bird netting: checking integrity over large areas

Starlings and other fruit-eating birds rank among the main threats to a mature blueberry plot: a flock can damage a harvest within just a few hours, drawn to ripe, sugary fruit. The most widespread response remains bird netting: well tensioned and closed at its base, with a 10 to 15 mm mesh to stop birds poking their heads through and pecking fruit directly, it is reputed to be around 95% effective. That figure, however, assumes a net that is intact and properly anchored to the ground along its whole perimeter — a condition that becomes hard to check on foot once the covered area exceeds a few hectares, and more so on the new blocks of several dozen hectares currently being planted.

A drone pass over the plot, whether an orthophoto or low-altitude video, reveals in a single outing what a walking inspection takes hours to cover: tears, sagging sections, loosened anchors leaving a gap at ground level, or areas where the netting was poorly closed back up after an intervention. This check is best scheduled ahead of the ripening period, then again mid-season for a long campaign. For growers who favour active deterrence over netting, or as a complement on the most exposed zones near a hedge or a wood, our guide to drone bird deterrence for vineyards and orchards details a method directly transferable to blueberry.

What a drone does not measure, and 2026 prices

The honesty clause. A drone, however well equipped, measures neither soil pH — yet a decisive factor, since blueberry needs acidic soil between 4.5 and 5.5 — nor the fruit's sugar content or size: those parameters remain the domain of laboratory analysis and hand sampling. Nor does it detect, at aerial-flight scale, an infestation of Drosophila suzukii (the spotted wing drosophila), which lays eggs inside ripe fruit: spotting it requires close observation of the berries themselves, well beyond the reach of a camera flying dozens of metres up. A drone delivers maps that steer human intervention — where to irrigate more, where to replant, where to repair a net — never a plant-health diagnosis or a harvest decision on its own.

Orders of magnitude observed in France in 2026, excluding VAT:

These missions build on our precision agriculture by drone offer; the regulatory information on this page reflects the rules in force in September 2026. Request a quote stating the surface area, the plantation's age and the priority objective — vigor, irrigation or netting.

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