What is assessed when drones apply plant protection products
An agricultural drone may observe crops or carry an application system. These are different activities. This article concerns plant protection product application and its relationship with the health and safety of pilots, people preparing the work, material handlers and those entering the treated area afterwards. Remote control changes the distribution of tasks but does not automatically eliminate exposure.
The relevant preventive question is not simply whether the pilot stands away from the spray. Consider what each person does throughout the working day and the conditions left for others. An innovation may reduce one exposure while retaining others. Assess the whole process before describing it as safer or replacing an established method. A clear description of the operation is the starting point for a meaningful comparison.
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Aerial application and the Spanish framework
The joint MAPA and AESA information note from 2018 classifies drone treatments with plant protection products as aerial applications. It is used here only to clarify that classification; its older aviation references are not presented as current instructions. Permission to use a drone for crop observation does not establish permission to apply a chemical treatment.
When considering a contract, separate documentation by purpose: observation, application and other agricultural operations. This avoids reusing evidence that addresses a different activity. Product conditions, the setting and the contracted service must match the actual operation. A trade-show demonstration or promotional video does not replace documentary checks for the intended work. Clarifying the purpose also helps identify which specialist must resolve outstanding questions before the service is agreed.
Sources: [5]
Authorisation of the treatment and product
In Spain, Article 27 of Royal Decree 1311/2012 generally prohibits aerial applications except in the specified special cases. It requires particular conditions and products authorised for the crop and pest and approved for aerial application. Regional authorisation and the relevant plan must be checked as applicable; ownership of equipment is not authorisation.
Before committing to a date, identify who verifies documentation and how the result is recorded. Do not assume that a product authorised for ground application can be applied by drone. A pending application does not itself establish available permission. Checks need to consider the current legislation, applicable conditions and authority responsible for the particular treatment. Procurement should allow time to resolve these matters instead of treating them as paperwork to complete after the work.
Sources: [1]
Aviation requirements remain a separate component
AESA publishes the specific-category operating framework and documentation for plant protection operations under PDRA.S01.F. The applicable regime depends on the operation’s characteristics and conditions. Its current page distinguishes authorisations, declarations for suitable standard scenarios and certified-operator privileges; it does not say that one procedure enables every flight.
Service review should establish that the operator and intended operation match the aviation documentation. Clarify responsibility for location restrictions, maintenance and personnel competence. Agricultural authorisation and aviation compliance address different matters. Filing one document and treating both areas as resolved leaves a gap that a properly designed digital record can expose. The review should focus on whether evidence applies to this service, rather than simply counting certificates or accepting the contractor’s general description of experience.
Sources: [2]
Exposure extends beyond the flight
INSST identifies possible exposures across transport, storage, mixing, loading, application, cleaning and waste handling. It also considers workers entering treated crops, residents and bystanders. This whole-cycle approach is relevant when reviewing drone work, even if the pilot’s distance reduces contact during one phase.
A practical proposal is to describe tasks and responsibilities without relying solely on job titles. The same person may pilot in the morning and carry out auxiliary work later. Establish which surfaces, tools and areas the team shares, how materials are separated and what instructions each participant receives. The result should support measures for actual situations rather than a general declaration that automation protects everyone. This task-based description also makes omissions easier to identify when several companies contribute to the service.
Sources: [3]
What a 2025 field study contributes
A vineyard study published in 2025 measured dermal exposure during drone application. It found differences between piloting and auxiliary work, with mixing and loading as critical points. Comparisons with conventional methods used model estimates rather than simultaneous trials of every method. The studied location and conditions limit generalisation.
For procurement, this finding supports more precise questions: which tasks are covered by a lower-exposure claim, who performs them and how the result was measured. It does not establish a universal reduction percentage or equivalent protection in every crop. Nor does the study justify copying a concentration, height or flight configuration: those are research variables, not instructions for another operation. A supplier should distinguish measured findings, modelled comparisons and benefits that remain to be demonstrated locally.
Sources: [4]
Drift, surroundings and access arrangements
Service assessment should identify who may be present and what other activities coincide with treatment. Review paths, work by other businesses, staff access and communication with the farm’s responsible personnel. An administrative map is useful only if it reflects the actual surroundings on the day, including activities that may not have been planned when the contract was signed.
Authorised product and operational conditions should determine restrictions; do not invent one distance or re-entry period for every situation. Planning must allow work to be postponed when necessary conditions are unmet. Pressure to finish a field is not a safety criterion. In addition to announcing the start, clarify who confirms the information needed to organise later tasks. The handover should remain usable for people who were absent during the flight.
Equipment risks and coordination of work
Preventive assessment should include equipment handling, energy sources, component transport and maintenance as well as chemical hazards. Identify where physical effort, environmental attention and time pressure coincide. Buying a larger-capacity system can change loads and work organisation, so the whole activity needs review rather than assuming that fewer refills necessarily produce an overall improvement.
Coordination should clarify responsibilities among the farm owner, application company, pilot and auxiliary staff. Manufacturer instructions and service conditions must be understandable to those carrying out the work. This article specifies no manoeuvres, mixing procedures or repairs: it proposes checking that each task has applicable instructions, competent owners and a way of reporting problems without improvisation. The aim is to make responsibility workable at the interfaces between organisations.
Hypothetical example: a cooperative reviews an offer
A cooperative receives an offer promising to eliminate exposure because the pilot works remotely. Before contracting, it asks for preparation, loading, cleaning and subsequent access tasks to be identified. It discovers that the offer describes the flight clearly but does not explain who will handle auxiliary work or coordinate with the farm crew.
The cooperative requests a complete scope and separate checks of treatment, product and flight documentation. Its decision is based on comparing complete services rather than rejecting the technology. If the necessary conditions are not met, work does not proceed merely because a date has been reserved. This example illustrates an assessment approach, not an actual treatment or administrative authorisation. A later review can examine whether the agreed division of duties worked in practice.
Indicators and records that support prevention
Potential measures include the proportion of services with checked documentation, coordination incidents, auxiliary tasks covered by assessment and completed improvement actions. Record changes to the product, equipment or scope that require renewed review. These organisational indicators do not independently measure absorbed dose or health effects, and should not be presented as substitutes for exposure assessment.
An occupational hygiene assessment requires methods suited to the exposure being investigated. Health findings belong within the relevant professional pathway and should not become a worker ranking. Campaign comparisons need to consider duration, tasks and relevant conditions. Fewer flight hours do not necessarily mean less contact during mixing, and a complete flight log does not establish prevention across the entire process. The records should help teams ask better questions rather than provide unwarranted reassurance.
Relationship with Sabentis and service review
OSH management can connect task assessments, contractor documentation, training, responsibilities and incidents. Sabentis is relevant to this preventive traceability; this article does not claim that it authorises flights, chooses products or replaces agronomic, aviation and occupational hygiene judgement. Integration should preserve distinctions between pending, checked and specifically applicable documentation, including the context in which it was reviewed.
After a campaign, examine preparation and coordination problems, missing information and changes needing follow-up. A real improvement may be a clarified responsibility or an avoided poorly planned task, even without increasing treated hectares. The preventive value of a drone must be demonstrated under specific conditions alongside measures protecting everyone involved. That provides a more useful basis for investment than treating technical novelty as proof that exposure has disappeared.
Frequently asked questions
Does a drone eliminate pesticide exposure?
No. Piloting, auxiliary work, cleaning and later access need assessment, among other situations.
Is flight permission sufficient?
No. Aviation operations and plant protection treatments have different requirements that must be checked for the particular work.
Can any product authorised for agriculture be used?
Do not assume so. Check the crop, pest, application method and authorisation conditions.
Is exposure reduced equally by every drone?
No universal percentage is established. Evidence depends on equipment, tasks and the conditions studied.
