Aircraft Disinsection in the United States: What Is Legal, What WHO Recommends, and What Italy Requires

Research checked July 24, 2026. Because pesticide registrations and destination requirements can change, every treatment should be verified for the specific product, state, aircraft, route and date of operation.

Aircraft disinsection is one of the most confusing services in aviation. A destination country may require it. The World Health Organization may describe how to perform it. A product manufacturer may say that its formulation follows WHO specifications. The U.S. Environmental Protection Agency may register a product for one part of an aircraft but not another. The aircraft operator may then be asked for an ICAO certificate at arrival.

All of those statements can be true at the same time, but they do not mean the same thing.

The short answer: aircraft disinsection is not completely prohibited in the United States. However, a U.S. company cannot select any insecticide containing the right percentage of permethrin and apply a WHO procedure. The exact EPA-registered product, its current label, the treatment area, the application method, the person applying it, state requirements and the destination country's rules must all align.

This article explains those layers, corrects a common misunderstanding about Callington One-Shot and Pre-Spray, examines the special problem of residual disinsection in the United States, and provides a practical review of Italy and the countries listed by the U.S. Department of Transportation.

What is aircraft disinsection?

Disinsection is the use of public-health measures to control or kill insect vectors carried in an aircraft, baggage or cargo. It is different from routine aircraft cleaning and different from disinfecting a cabin against viruses or bacteria.

Countries may require disinsection to reduce the risk of importing mosquitoes that can transmit dengue, yellow fever, malaria, chikungunya or Zika. Some countries also use it to protect agriculture and local ecosystems from invasive insects.

The WHO Aircraft Disinsection Methods and Procedures, second edition, published in November 2023, describes several methods:

  • Pre-embarkation treatment: an aerosol treatment of the empty cabin before passengers board. WHO specifies a 2% permethrin aerosol for this method.
  • Pre-departure treatment: an aerosol treatment after passengers have boarded but before the overhead lockers are closed and the aircraft is pushed back. WHO specifies 2% d-phenothrin or 2% 1R-trans-phenothrin. In the 2023 second edition, this method replaced the older “blocks-away” and “top-of-descent” methods.
  • Pre-departure cargo-hold treatment: treatment of cargo areas, normally using a single-shot aerosol with the active ingredients specified by WHO and the destination authority.
  • On-arrival treatment: a contingency treatment supervised or required at the destination when a compliant treatment was not completed before departure.
  • Residual treatment: a long-term surface treatment, normally repeated at intervals no longer than eight weeks. WHO describes a 2% permethrin emulsifiable concentrate applied to achieve a target deposit on cabin and cargo-hold surfaces.

WHO guidance is influential, but WHO says two things that are essential to understanding the subject: national authorities at the destination determine whether disinsection is required, and regulatory approval of disinsection products is outside the scope of the WHO document. In other words, WHO describes technical methods; it does not grant permission to use a pesticide in the United States.

Who controls what?

WHO: technical methods, not U.S. legal authorization

WHO recommends formulations, application rates, procedures, equipment and documentation. A destination country may incorporate all or part of those recommendations into its own rules. WHO guidance does not replace the pesticide law of the country where the treatment is performed.

EPA: the pesticide product and its legal use in the United States

EPA registers pesticide products under the Federal Insecticide, Fungicide, and Rodenticide Act, commonly called FIFRA. The legally enforceable label defines where, how, how much, how often and by whom a registered pesticide may be used. EPA summarizes the rule plainly: the label is the law.

An EPA registration is not an EPA endorsement. EPA's own registration notices state that registration must not be represented as a recommendation or endorsement by the agency. The accurate wording is EPA-registered for the uses stated on its label, not “EPA-approved for aircraft” in a broad sense.

State agencies: product registration, business licensing and applicator requirements

Federal registration is not always the final step. States can require a product to be registered for sale or use in that state, and they may regulate pest-control businesses or applicators. For example, the Florida Department of Agriculture and Consumer Services requires pesticide products sold or distributed in Florida to be registered with the state and separately regulates pest-control activities. A company should obtain a written category determination from its state regulator when aircraft work does not fit neatly into an ordinary licensing category.

CDC and HHS: inbound public-health authority

Under 42 CFR 71.44, the CDC Director may require an arriving aircraft to be disinsected after it has left a foreign area affected by an insect-borne communicable disease and is suspected of carrying insects of public-health importance. The regulation makes the air carrier responsible, or the pilot in command when the aircraft is not for hire, and places the treatment under federal monitoring.

That inbound emergency authority does not create a general right to perform outbound commercial disinsection with a product or method that is not authorized under FIFRA.

FAA and DOT: aviation safety and information, not pesticide registration

The FAA does not register or “approve” disinsection chemicals. Aircraft airworthiness, hazardous-material restrictions, smoke detectors, avionics, interior materials and the aircraft maintenance manual remain important, but pesticide registration belongs to EPA.

DOT states that it has no regulation specifically governing aircraft disinsection. It maintains a public list of foreign-country requirements, but its current page was last updated on March 1, 2021 and warns that policies may be changing. That list is useful for planning, not as final dispatch authority.

The destination country: whether the treatment and paperwork will be accepted

The arrival country decides whether a flight must be treated, which methods it accepts, what products or active ingredients qualify, and what certificate must be presented. A treatment can be lawful in the United States but still fail the destination's entry requirement. The reverse is also possible: a destination may request a WHO method that cannot lawfully be performed with an available U.S. product.

The practical rule is to satisfy every applicable layer. For work performed in the United States, the EPA label and state law control the application. The destination authority controls acceptance. WHO supplies the technical framework when the destination adopts it. The aircraft manual and operator procedures control material and operational compatibility.

Is aircraft disinsection allowed in the United States today?

The answer depends on the compartment, method, product and operator.

Occupied civilian passenger cabins

We found no current civilian disinsection label authorizing aerosol application in an occupied aircraft cabin in the United States. EPA's 1996 Pesticide Registration Notice 96-3 required data before EPA would register occupied-cabin disinsection and required products intended only for other aircraft areas to exclude cabin use clearly.

Products marketed internationally for “blocks-away,” “top of descent” or other passenger-on-board methods should not be used in a U.S. aircraft merely because WHO describes the method or another country accepts the product.

What about Callington Top of Descent?

Callington Top of Descent is a 2% d-phenothrin aerosol intended for passenger-on-board cabin spraying. The product name reflects the older procedure in which the cabin was sprayed as the aircraft began its descent. It has also been marketed for “blocks-away” spraying.

The terminology has changed. WHO's 2023 second edition states that the former blocks-away and top-of-descent methods have been replaced by the pre-departure method. Under the current WHO procedure, the cabin is sprayed after passengers have boarded but before the overhead lockers are closed and before pushback. WHO specifies 2% d-phenothrin or 2% 1R-trans-phenothrin for that method. The current Callington technical data sheet similarly describes the product for pre-departure and on-arrival treatment, even though “Top of Descent” remains its commercial name and some Callington webpage language still refers to the older in-flight method.

That WHO alignment does not authorize its use in the United States. Unlike Callington One-Shot and Pre-Spray, the Top of Descent product materials we reviewed do not identify a U.S. EPA registration number, and we found no EPA-accepted label authorizing it for U.S. aircraft-disinsection use. Its listed aviation-material specifications, Airbus reference, NATO stock number and WHO-compatible formulation are not substitutes for an EPA registration.

Therefore, Callington Top of Descent should not be applied to a civilian aircraft while it is on the ground in the United States or while it is in U.S. airspace. It may be available for use in another jurisdiction when the country where application occurs has authorized the product, the destination accepts the method, the aircraft operator permits it, and all applicable instructions are followed.

Do not confuse the two Callington cabin products: Pre-Spray contains 2% permethrin and is designed for the empty-cabin pre-embarkation method. Top of Descent contains 2% d-phenothrin and is designed for passenger-on-board pre-departure or authorized on-arrival use. Only Pre-Spray has the U.S. EPA cabin registration discussed in this article—and even that registration currently conflicts with EPA's March 2026 public guidance page.

Civilian cargo holds

Yes, cargo-hold disinsection has been permitted with an appropriately registered and labeled product. Callington One-Shot, EPA Reg. No. 83795-1, has been registered since August 2007 for aircraft cargo holds. Its accepted label says cargo holds only and requires the aircraft to be on the ground and empty of passengers, protected handlers, a specified application rate and ventilation before passenger boarding.

Unoccupied civilian cabins before embarkation

EPA issued a conditional registration for Callington Pre-Spray Aircraft Insecticide, EPA Reg. No. 92953-1, on May 15, 2025. The accepted label authorizes pre-embarkation use in unoccupied cabin, crew and cargo areas. It prohibits occupied-aircraft application and restricts application to properly trained airline personnel.

The label requires, among other things, the aircraft to be on the ground and empty of passengers and flight crew; a rate of 35 grams of product per 100 cubic meters; air conditioning off during application and for 20 minutes afterward; at least 10 minutes for drying; and at least 10 minutes of ventilation before passengers and crew board.

There is an unresolved contradiction in EPA's own current records. EPA's live Pesticide Product Label System lists registration 92953-1 as active, and EPA's accepted 2025 label authorizes unoccupied cabin use. However, EPA's Aircraft Disinsection webpage, updated March 6, 2026, says that no EPA-registered cabin-disinsection products exist and that cabins cannot be treated in the United States or its airspace.

A service provider should not hide this conflict or advertise cabin disinsection as unambiguously cleared. Before performing civilian cabin treatment, verify the product's current status in EPA's live database, confirm state registration and licensing, and obtain written clarification from EPA or the appropriate enforcement authority—especially if the applicator is a third-party aircraft-detailing company rather than airline personnel.

U.S. military aircraft

EPA registered Aircraft Insecticide 2% Permethrin, EPA Reg. No. 88144-1, in 2018 for unoccupied U.S. military aircraft only. Its label limits application to trained Department of Defense personnel or specifically trained contracted pest-management professionals working at a U.S. military installation. It does not authorize civilian aircraft treatment.

Was disinsection illegal before Callington One-Shot and Pre-Spray?

That statement is too broad and should be corrected.

  • Before One-Shot: EPA had already regulated aircraft insecticides, but its 1996 policy sharply restricted occupied-cabin claims and required clearer labels.
  • One-Shot changed the cargo-hold answer in 2007: Callington One-Shot received a conditional federal registration for localized treatment in aircraft cargo areas. During that registration, EPA required removal of a broad “WHO approved formulation” statement. This is a useful example of why WHO compatibility and EPA registration must not be blended into one claim.
  • Military cabin treatment existed before civilian Pre-Spray: EPA first allowed a special military exemption in 2016 and then registered the military-only product in 2018.
  • Pre-Spray changed the civilian unoccupied-cabin record in 2025: the accepted label created a narrow pre-embarkation use—not permission for occupied-cabin spraying, residual surface treatment or any application by any contractor.

A more accurate statement is: before May 15, 2025, we did not identify a civilian EPA disinsection label authorizing this specific unoccupied-cabin pre-embarkation use; cargo-hold and military-only authorizations already existed.

Where WHO and EPA differ

WHO is advisory; the EPA label is enforceable in the United States

WHO says its recommendations are advisory to national authorities and that product approval is outside the scope of its disinsection manual. In the United States, a company must follow the EPA label even when the label is more restrictive than WHO.

WHO also maintains a prequalification record for Callington Pre-Spray. That evaluation may support a destination authority's product decision, but WHO prequalification is not a U.S. pesticide registration and does not expand the EPA label.

WHO permits methods that have no matching civilian U.S. label

WHO describes passenger-on-board methods using d-phenothrin or 1R-trans-phenothrin. We found no matching civilian U.S. aircraft-disinsection label for occupied-cabin use. WHO also describes long-term residual surface treatment, but we found no active civilian U.S. label authorizing that WHO residual method in aircraft cabins.

The U.S. Pre-Spray label has stricter timing

WHO's pre-embarkation procedure switches off air conditioning during treatment and for five minutes afterward. The U.S. Pre-Spray label requires air conditioning to remain off for 20 minutes after spraying, followed by the label's drying and ventilation requirements. In the United States, the label timing controls.

“Residual aerosol” is not the same as WHO residual disinsection

Callington marketing sometimes describes Pre-Spray as a residual aerosol because it leaves a short-lived deposit after pre-embarkation spraying. WHO itself says the aim of pre-embarkation aerosol treatment is short-term, not long-term, residual effect.

WHO's separate residual method uses a 2% permethrin emulsifiable concentrate applied systematically to interior surfaces, normally at a target of 0.2 grams of active ingredient per square meter and a higher floor target. It is intended to last up to eight weeks. EPA's live data classifies Callington Pre-Spray as a non-residual space treatment. Pre-Spray is therefore not a substitute for an eight-week ICAO residual treatment.

Can residual disinsection be applied in the United States?

For ordinary civilian aircraft, our research did not identify an EPA-registered product whose current label authorizes the WHO long-term residual cabin-and-cargo treatment. That means a U.S. company should not perform residual disinsection simply by purchasing or mixing a product that contains 2% permethrin.

The concentration alone is not permission. “Permethrin 2%” can describe different formulations and uses:

  • A 2% aerosol used for short-term pre-embarkation space treatment is not the same as a 2% emulsifiable concentrate used for long-term surface treatment.
  • A lawn, clothing, structural or mosquito-control product containing permethrin cannot be moved to an aircraft use site unless its label permits that exact use.
  • A product registered for cargo holds cannot be applied to passenger-cabin surfaces.
  • A military-only product cannot be used in a civilian aircraft.
  • A destination country's acceptance of 2% permethrin does not override U.S. FIFRA requirements.

Therefore, using “the appropriate amount of 2% permethrin according to WHO” does not make civilian residual disinsection legal in the United States. The missing element is not only dose; it is a current EPA registration and label authorizing the aircraft site, residual method, application rate, reentry conditions and applicator.

Can the operator or pilot perform the disinsection?

Sometimes—but there is no universal yes.

WHO and ICAO documentation contemplate a role for the authorized agent or pilot in command. WHO says the operator is responsible for ensuring that certification meets the arrival country's requirements, and the ICAO General Declaration can be signed by an authorized agent or the pilot in command. U.S. law also makes the pilot in command responsible when CDC orders inbound disinsection of a non-hire aircraft under 42 CFR 71.44.

Those documentation and responsibility rules do not expand an EPA label. For Callington Pre-Spray, the accepted U.S. label states that applications must be performed by properly trained airline personnel. A private-aircraft pilot, aircraft owner, FBO employee or third-party detailer is not automatically “airline personnel.” A pilot's authority over the aircraft does not create pesticide authority.

Before an operator or pilot self-applies a product in the United States, four questions need written answers:

  1. Does the current EPA label authorize this aircraft area and this method?
  2. Does the person applying it fall within the label's applicator language and any state licensing rules?
  3. Does the destination accept the method, product, application record and signer?
  4. Does the aircraft operator's manual allow the product around the relevant materials and systems?

Signing an ICAO form can document a lawful treatment. It cannot convert an unlawful or incorrectly performed treatment into a valid one.

Italy: what the authorities currently require

Italy deserves special attention because its documentation requirements are stronger and more actively enforced than those of many destinations.

The current risk-based rule

An Italian Ministry of Health clarification dated March 14, 2024 states that aircraft arriving directly or indirectly, including through intermediate stops, from countries or territories considered at risk must carry a residual-disinsection certificate. The circular identifies risk by the presence of Aedes aegypti and by frequent and continuous dengue risk, using referenced ECDC, WHO and CDC information.

The certificate must follow Appendix 4 of ICAO Annex 9, remain valid for no more than eight weeks, and clearly identify the issuing authority or company, the printed name, signature and affiliation of the signer, the treatment date and the expiration date.

Italy's 2020-2025 National Arbovirus Plan was formally extended through December 31, 2026 while a 2026-2030 plan is prepared. The older national plan used broader language about arriving aircraft. The later March 2024 circular is the more specific operational clarification: it directs enhanced controls toward aircraft linked directly or indirectly to listed risk countries. Because local USMAF-SASN border-health offices enforce the requirement, the destination office should confirm how it applies the current risk list to a particular aircraft's recent routing.

What happens if the aircraft has no valid residual certificate?

The March 2024 circular provides an exceptional single-sector alternative for civil and general aviation. An aircraft without a valid residual certificate may use a WHO-conforming pre-embarkation, pre-departure, pre-departure cargo-hold or on-arrival method. The treatment must be recorded in the aircraft General Declaration with identifying information for the aerosol cans, and the used or partly used cans must remain on board for inspection.

After arrival, the Italian USMAF-SASN office can direct the aircraft to receive a valid residual treatment before departing Italy or before returning to Italy within the next 28 days. Failure to comply with a public-health direction may be referred to enforcement authorities.

When a qualifying residual treatment cannot lawfully be applied in the United States, the operator's practical choices may include maintaining a current residual treatment applied by an authorized provider in a jurisdiction where that method and product are legal, or using Italy's exceptional single-sector aerosol pathway and arranging the required residual treatment under the direction of the Italian authority. Either route should be approved in writing before departure.

Will Italy accept a certificate from a U.S. operator or service company?

The 2024 circular says a residual certificate presented by an airline or a company performing pest-control measures on its behalf may be accepted if it follows ICAO Appendix 4 and contains the required company and signer details. This is more flexible than saying only an Italian government office may issue the certificate.

However, document acceptance and legal application are separate questions. A U.S. company cannot issue a truthful eight-week residual certificate if it did not lawfully perform a qualifying residual treatment. A private pilot's signature alone is not a reliable substitute for the issuing-company information required on a residual certificate.

For the exceptional one-sector aerosol method, the General Declaration can be completed by the operator's authorized agent or pilot in command, consistent with ICAO practice. Italy may accept that documentation if the treatment, product, quantity and route meet the circular. Acceptance is still decided by the arriving USMAF-SASN office.

Best practice for an Italy-bound flight: send the aircraft registration, type, last 28 days of routing, proposed method, product label, spray calculation and draft certificate or General Declaration to the destination FBO and USMAF-SASN office before treatment. Ask for written confirmation. Do not wait until arrival to discover that the product was lawful in the United States but the certificate is unacceptable in Italy—or vice versa.

Countries reported as requiring aircraft disinsection

This is a planning list, not a current dispatch release. The only U.S. government consolidated list we found is DOT's Aircraft Disinsection Requirements page, last updated March 1, 2021. DOT itself warns that policies may change. The short country notes below accurately describe what that page reported, with newer primary sources added for Australia, New Zealand and Italy. Operators must confirm the current rule with the destination health, agriculture or border authority and their handling agent before each flight.

DOT reported aerosol treatment of all inbound flights while passengers are on board

Ecuador: DOT limited this entry to the Galápagos Islands and inter-island operations. Confirm the procedure with the Galápagos biosecurity authority because mainland Ecuador and Galápagos operations are not interchangeable.

Grenada: DOT reported passenger-on-board aerosol disinsection for all inbound flights. Confirm the accepted active ingredient, treatment point and General Declaration requirements before departure.

Guyana: DOT reported passenger-on-board aerosol disinsection for all inbound flights. Because occupied-cabin treatment does not match a civilian U.S. disinsection label we found, ask whether an unoccupied pre-embarkation method is accepted.

India: DOT reported passenger-on-board aerosol disinsection for all inbound flights. Obtain current instructions from the arrival airport health organization because enforcement and the flights selected for inspection may vary.

Kiribati: DOT reported passenger-on-board aerosol treatment for all inbound flights. Confirm the exact method with the destination authority, especially for charter and private operations.

Madagascar: DOT reported passenger-on-board aerosol treatment for all inbound flights. Verify whether the current rule accepts pre-departure, on-arrival or another WHO method.

Panama: DOT reported passenger-on-board aerosol treatment for all inbound flights. Operators should confirm current requirements with the airport health authority because route and outbreak conditions can affect practice.

Seychelles: DOT reported passenger-on-board aerosol treatment for all inbound flights. Confirm the accepted product and whether the treatment must be shown on the General Declaration.

Tanzania: DOT reported passenger-on-board aerosol treatment for all inbound flights. Verify the current port-health procedure and whether treatment is route-dependent.

Timor-Leste: DOT reported passenger-on-board aerosol treatment for all inbound flights. Confirm product, timing and retained-can requirements before departure.

Trinidad and Tobago: DOT reported passenger-on-board aerosol treatment for all inbound flights. Ask the destination authority whether it now accepts an unoccupied alternative.

Uruguay: DOT reported passenger-on-board aerosol treatment for all inbound flights. Confirm whether this remains a universal requirement and which authority validates the declaration.

Zimbabwe: DOT reported passenger-on-board aerosol treatment for all inbound flights. Obtain current port-health instructions for the specific airport and route.

DOT reported all inbound flights, with residual or unoccupied aerosol alternatives

Australia: Australia currently uses a detailed joint schedule with New Zealand. Version 5.3 accepts residual, pre-embarkation, pre-departure and supervised on-arrival methods under specified conditions. Residual and pre-embarkation programs require an approved arrangement; a contracted third-party applicator must be included in that arrangement. Noncompliant aircraft can be held closed on arrival for supervised treatment.

Barbados: DOT reported disinsection for all inbound flights while allowing residual treatment or unoccupied aerosol treatment as alternatives. Confirm the certificate form, treatment interval and accepted product with the local authority.

Chile: DOT reported disinsection for all inbound flights with a residual alternative. Confirm whether the requirement remains universal and whether agriculture controls add a route-specific condition.

Cook Islands: DOT reported disinsection for all inbound flights while permitting residual treatment or unoccupied aerosol treatment. Confirm private and charter procedures with the Cook Islands border authority.

Fiji: DOT reported disinsection for all inbound flights with residual or unoccupied-aerosol alternatives. Verify accepted certification and the treatment of small baggage compartments before departure.

Jamaica: DOT reported disinsection for all inbound flights while allowing residual treatment or aerosol treatment without passengers aboard. Confirm the current health or agriculture requirement for the specific origin.

New Zealand: The current joint Australia-New Zealand schedule requires international aircraft to meet New Zealand's Craft Risk Management Standard. Residual and pre-embarkation methods require an agreement with the Ministry for Primary Industries; pre-departure treatment can be used without that agreement, subject to the schedule. If treatment is missing or incorrect, doors remain closed until quarantine officers supervise or conduct on-arrival treatment.

DOT reported requirements for selected flights

Czech Republic: DOT reported treatment for flights from areas of contagious disease. Because that trigger is broad, obtain a current route-specific determination rather than assuming every flight is covered.

Egypt: DOT reported treatment for flights from Zika-affected countries. Confirm the current disease list and accepted method with the Egyptian arrival authority.

France: DOT reported treatment for flights from areas affected by malaria, yellow fever or dengue. Confirm whether the requirement applies to the aircraft's immediate origin, earlier sectors or recent operating history.

Hong Kong: DOT reported treatment of aircraft arriving from countries then placed in WHO Zika Categories 1 or 2. Those category references can become outdated, so current port-health instructions are essential.

Indonesia: DOT reported treatment for flights from infected areas. Ask the destination authority to identify the current affected areas and accepted WHO method.

Italy: Italy's March 2024 circular requires an eight-week ICAO residual certificate for aircraft arriving directly or indirectly from risk countries or territories. A WHO aerosol method documented on the General Declaration may be used exceptionally for one sector when the residual certificate is missing, but the arriving USMAF-SASN office may then order residual treatment.

Mauritius: DOT reported that flights generally affected include those from Africa, Asia and its subregions, the Middle East, Indian Ocean islands, and other countries where mosquito-borne disease is prevalent. Confirm whether the specific route is in scope and which alternative methods are accepted.

Macau: DOT reported treatment for flights from countries affected by major infectious diseases or Zika. Confirm the current disease trigger and product documentation.

Palau: DOT reported a requirement for non-U.S. carriers arriving from Korea, Hong Kong, Macau and Thailand. Verify whether carrier nationality, origin list and any U.S.-carrier exception remain current.

Peru: DOT reported treatment for some domestic flights. The relevant sectors must be confirmed locally; this listing should not be read as an international-arrival rule for every flight.

Republic of Korea: DOT reported a list of 30 origin countries and stated that the United States was not included. Obtain the current origin list because outbreak designations change.

South Africa: DOT reported treatment for flights arriving from malaria or yellow-fever areas. Confirm the current geographic trigger and port-health procedure.

Switzerland: DOT reported treatment for flights from intertropical Africa. Verify the current definition of the covered region and whether the rule is mandatory for the particular operation.

Taiwan: DOT reported treatment for flights from areas where Aedes aegypti or Aedes albopictus is present. Confirm the current origin list and acceptable certificate.

Thailand: DOT reported treatment for flights from yellow-fever areas. Confirm the current yellow-fever country list and whether treatment must occur before departure or can occur on arrival.

United Kingdom: DOT described treatment of flights from malarial countries and countries with confirmed Zika transmission as voluntary. This should not be presented as a universal legal requirement.

A practical decision process for a U.S. operator or service provider

  1. Identify the exact route and risk trigger. Include intermediate stops and the aircraft's recent operating history when the destination, such as Italy, considers indirect arrival or lookback periods.
  2. Obtain the destination's current written requirement. Ask which methods, active ingredients, products, quantities and certificates are accepted for that aircraft and flight.
  3. Choose a specific product—not merely an active ingredient. Verify its EPA registration status in the live database and read the complete accepted label.
  4. Match the site and method. Cabin, cockpit, crew rest, lavatory, baggage compartment and cargo hold are not interchangeable. Pre-embarkation aerosol and eight-week residual treatment are not interchangeable.
  5. Confirm who may apply it. Check label language, state product registration, business licensing, applicator credentials, operator training and insurance.
  6. Check aircraft compatibility. Follow the aircraft maintenance manual and operator procedures. Protect food, food-contact areas, avionics, sensors and materials exactly as required.
  7. Calculate and document the treatment. Record aircraft type and registration, product name, EPA number, lot or can identifiers, active ingredient, amount, compartments, date, location, applicator and ventilation.
  8. Use the destination's required form. This may be the ICAO General Declaration, ICAO Appendix 4 residual certificate or a national form. Keep cans aboard when the destination requires inspection.
  9. Pre-clear the paperwork. Send it to the destination handling agent and competent health or agriculture authority before departure.

Key conclusions

  • Aircraft disinsection is not categorically illegal in the United States, but authorization is narrow and label-specific.
  • WHO recommendations do not override EPA or state pesticide law.
  • Callington One-Shot has authorized cargo-hold use since 2007; it did not authorize passenger-cabin use.
  • Callington Pre-Spray received a conditional EPA registration for unoccupied pre-embarkation cabin use in 2025, but EPA's March 2026 guidance page contradicts that registration record. Written clarification is prudent before commercial cabin work.
  • Callington Top of Descent is a 2% d-phenothrin passenger-on-board product. WHO now calls the corresponding procedure pre-departure treatment, but no U.S. EPA registration was identified for this product.
  • No civilian U.S. label was identified for the WHO eight-week residual cabin treatment. Using a 2% permethrin formulation and WHO dosage does not, by itself, make the treatment lawful.
  • A pilot may sign or be responsible for certain declarations, but that does not automatically make the pilot an authorized pesticide applicator.
  • Italy accepts properly completed ICAO documentation from airlines and service companies, but a lawful one-sector aerosol declaration is not the same as an eight-week residual certificate.
  • The DOT country list is a dated planning resource. Current destination confirmation is indispensable.

Primary reference material

Important: This article is educational and is not legal advice, an EPA interpretation, a destination clearance or authorization to apply a pesticide. Requirements can change during outbreaks and may be applied differently by the competent authority at the arrival airport. Confirm each operation in writing.

Callington's Trusted Partners:

Before requesting a certified disinsection service, do your research and ensure your provider is a trusted partner authorized to use the only EPA-approved disinsection product in the United States:  

Existing Clean Takeoff article, preserved for this design review.

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