Treatment suppliers

Treatment suppliers must be approved to the appropriate MPI standard to treat imported goods, or exported plant or forest products. Find out about approved treatment suppliers, treatments and the supplier approval process.

Approved treatment suppliers

Treatment suppliers must be MPI-approved to treat:

  • imported risk products for biosecurity clearance
  • products for export to meet destination country requirements.

Find approved treatment suppliers [PDF, 128 KB]

Becoming an approved treatment supplier

To become an approved treatment supplier, you need to apply through an independent verification agency (IVA).

Contact one of the following agencies that are approved by MPI to evaluate treatment suppliers for MPI-approval:

Find out more:

Requirements for treatment suppliers

General requirements for approved treatment suppliers are set out in the MPI standard Treatment supplier programme.

Imported seed fungicide treatment suppliers are approved under the Standard for transitional facilities for general uncleared risk goods (TFGEN).

Some export treatment suppliers (such as for seeds and timber) are approved under plant export standards.

Treatment options

For imported goods that need treatment to get border clearance, MPI provides a list of treatment options (and importer responsibilities) in the standard Approved biosecurity treatments.  

Approved biosecurity treatments [PDF, 488 KB]

Goods being treated for export may have different requirements from imported goods. Check requirements for exported plant products in the relevant importing country phytosanitary requirements (ICPR).

Choosing a suitable insecticide aerosol for sea containers

Suitable insecticide aerosols have at least one knock-down and one residual active ingredient from Table 1.  To ask about the suitability of a particular aerosol or an active ingredient not listed in the table, email

Table 1 Suitable active ingredients for insecticide aerosols

Knock-down ingredient
(minimum single or combined amount 1g/kg or 0.1%)

Residual ingredient
(minimum single or combined amount 0.5g/kg or 0.05%)

  • tetramethrin
  • d-phenothrin
  • esbiothrin
  • d-allethrin
  • permethrin
  • cyphenothrin

Note: bicycloheptene dicarboximide and piperonyl butoxide are propellants or synergists and do not have insecticide properties.

If you see live insects in a container, spray insecticide in the container to prevent them from escaping. If you suspect that a container is infested with multiple insects, spray insecticide aerosol toward the top of the container for a minimum of 12 seconds (based on a 20 foot container) before closing it for at least 30 minutes.  To kill a single insect, spray the aerosol directly onto the insect for as long as it takes to kill it.

Call MPI's pest and diseases hotline to report insects and get advice on what to do.

  • Phone 0800 80 99 66.

If your facility has to meet food safety requirements for chemicals, these take precedence over aerosol spray requirements of transitional facilities. 

Methyl bromide treatment

Because it is an ozone-depleting substance, methyl bromide can be used only for official quarantine and pre-shipment treatments.

Disinfectants for transitional facilities

Offshore treatment suppliers

Some imported products need to be treated by offshore treatment suppliers to prevent introduction of pests and diseases into New Zealand. Offshore treatments are listed in the relevant import health standard.

Australian Fumigation Accreditation Scheme

The Australian Fumigation Accreditation Scheme (AFAS) provides a list of 'acceptable' registered offshore treatment providers which MPI recommends you use for offshore treatment (including Malaysian fumigation providers which have improved compliance).

New Zealand is moving towards a requirement to use only registered treatment providers for offshore treatment of goods. When in place, importers may have additional costs at the border if non-registered treatment suppliers have been used.

If you are importing products from overseas that require treatment prior to entry to New Zealand, check the AFAS list of offshore treatment suppliers.

Find out more

MPI updates

Who to contact

If you have questions about approved treatment suppliers, treatments or the supplier approval process, email

To report a pest, call our pest and disease hotline on 0800 80 99 66.

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