C-DRONE GUIDE · 14 SEPTEMBER 2026
Pear orchard and drone: vigor, bloom and fire blight, price
French table pear production fell to 138,900 tonnes in 2025, down 6% year-on-year according to Agreste estimates as of 1 September — Provence-Alpes-Côte d'Azur, the leading producing region, seeing an even sharper 15% drop to 48,600 tonnes. The French orchard rests on a handful of old varieties — Williams, Conférence, Guyot, Comice — all susceptible to the same dreaded adversary: fire blight (Erwinia amylovora), a bacterium introduced to France in 1972, classified as a regulated pest and subject to mandatory control nationwide since 2000. A detected outbreak requires reporting to the regional food service (SRAL) of the Draaf, followed by sanitation through pruning or uprooting the contaminated trees. On a crop where each tree represents fifteen to thirty years of production, a drone flight maps orchard vigor, bloom and water stress — never replacing the laboratory diagnosis that alone confirms a contamination.
Published on 14 September 2026, reviewed on 14 September 2026 — regulations in force as of September 2026.
French pear in 2025: an industry narrowed to a few varieties, under fire blight's threat
According to Agreste estimates finalised on 1 September 2025, French table pear production stands at 138,900 tonnes, down 6% year-on-year — yet still 9% above the 2020-2024 average, a sign of a crop that remains volatile from one year to the next. Provence-Alpes-Côte d'Azur, the leading producing region, accounts for most of the decline: its harvest is expected to fall 15% to 48,600 tonnes. The French orchard rests on a small number of varieties bred in the 18th and 19th centuries: among orchards affiliated with the Association nationale pommes poires (ANPP, around 2,800 ha, roughly 70% of national production), Williams accounts for 30% of the area, Conférence 19%, Guyot 10% and Comice 9% — summer varieties (Guyot, Williams), an autumn one (Comice) and a winter one (Conférence) that spread out the harvest but share the same sanitary vulnerability.
That vulnerability has a name: fire blight, caused by the bacterium Erwinia amylovora, introduced to France in 1972, which attacks apple, pear, quince and medlar trees. Fire blight is classified as a regulated non-quarantine pest (RNQP): the order of 31 July 2000 makes its control mandatory everywhere and permanently across the territory, supplemented by the ministerial order of 24 May 2006. The disease necroses leaves, flowers and young shoots before spreading to branches and, in the worst cases, the trunk — the same mandatory-control logic already found on grapevine with flavescence dorée, another regulated organism whose detection triggers an administration-controlled uprooting rather than a treatment left to the grower's discretion.
What a drone flight brings to pear orchards: bloom, vigor, water stress
On the broad strokes — tree counts, row-by-row vigor maps, canopy volumes — pear orchards follow the same logic as the rest of fruit growing, detailed in our drones in orchards guide. One specificity is worth highlighting, though: most commercial pear varieties are partially or fully self-sterile — Williams or Conférence only fruit properly near a compatible pollinator variety, planted in interspersed rows. A bloom flight, flown at peak flower opening, checks that the flowering windows of the main and pollinator varieties actually overlap from one plot to the next — a gap of a few days, common depending on the year's weather, can explain poor fruit set with no disease involved at all.
Pear blossoms early — often from late March in the earliest basins — which exposes it to the same spring frost risk as grapevine or stone fruit, detailed in our guide to spring frost in vineyards and orchards: a night-time thermal flight spots cold-air pockets to target active protection. During the season, regular multispectral or thermal mapping tracks orchard vigor and water stress, sector by sector. But a localised drop in vigor, branch dieback or foliage yellowing can have many causes — water stress, a deficiency, late frost — and fire blight is only one of them: an aerial map flags an anomaly to check on the ground, it never names the disease.
What research shows: drone detection of fire blight on pear and apple
Early remote-sensing detection of fire blight is an active research area, with one result obtained directly on pear. A Belgian team led by Herman Schoofs, Stephanie Delalieux, Tom Deckers and Dany Bylemans published a 2020 study in Agronomy monitoring pear orchards with a drone carrying spectral sensors throughout a growing season: comparing healthy and infected trees identified spectral bands (around 611 nm and 784 nm) and vegetation indices that separate the two states before necrosis becomes massively visible (see the study on Google Scholar).
A Chinese team led by Deqin Xiao, Yongqi Pan, Jianzhao Feng, Jianjun Yin, Youfu Liu and Long He published a 2022 study in Computers and Electronics in Agriculture building a fire-blight detection algorithm from drone multispectral imagery on an apple orchard, comparing several classification models: the random forest model reached an overall accuracy of 94% (see the study on Google Scholar). Angle explicitly broadened here: this second study covers apple, not pear — a species susceptible to the same pathogen, but with a different canopy architecture — which calls for a cautious transposition to pear rather than a direct application.
What a drone never does against fire blight, and 2026 prices
The honesty clause. No aerial camera, however fine its resolution, diagnoses fire blight on its own: the disease is neither classified nor confirmed by imagery. Only a visual inspection by a qualified agent, backed up where needed by a laboratory test (ELISA or PCR targeting Erwinia amylovora), confirms an outbreak — a drone map, at best, flags a declining area for priority ground inspection. In France, a confirmed outbreak must be reported to the regional food service (SRAL) of the Draaf, which then orders sanitation measures scaled to the outbreak's extent — pruning the contaminated parts or fully uprooting the trees — to be completed by the end of the following year at the latest, with the removed plant material gathered and burned on site to prevent any spread. Uprooting can open the right to compensation calculated on the département's agricultural disaster scale, and replanting susceptible species stays banned in an infected zone except by SRAL waiver. A drone documents the orchard's state before and after these operations; it replaces none of their regulatory steps.
Orders of magnitude observed in France in 2026, excluding VAT:
| Service | Observed price (excl. VAT) |
|---|---|
| Bloom mapping, pollinator overlap check (up to 5 ha) | €300 to €600 |
| Night-time thermal flight, spring frost risk | €300 to €600 per outing |
| Multispectral vigor mapping, single pass | €300 to €600 |
| Combined monitoring over a season (bloom + vigor + water stress) | €800 to €1,500 depending on surface |
These missions build on our precision agriculture by drone offer; the regulatory information on this page reflects the rules in force in September 2026. Facing a suspected outbreak, the priority remains ground inspection and reporting to your Draaf's SRAL — the drone flight then comes in to document the extent of the affected area. Request a quote stating the area, the varieties present, and the priority objective — bloom, frost or vigor.