Finalised Import Risk Analyses

​Finalised IRAs can be found here, covering a wide range of plant products and commodities and/or pests and diseases of specific concern to Tasmania in trade. Such IRAs may be subject to review every several years to ensure they remain fit-for-purpose, as changes occur to a pest or diseases profile in trade (pathway risk). This may be as a result of:

  • New plant product lines or commodities being sought to be imported, which were not traded at the time of the IRA review;
  • Changes to a pest or diseases known incidence in the field interstate, including new foreign pest incursions or outbreaks requiring emergency plant pest regulatory controls, national foreign pest outbreak information can be found at;
  • New knowledge about a target pest's vectoring potential for new pests or diseases not previously considered to be a risk at the time of IRA review;
  • Changes to the nature and/or degree of regulatory intervention by interstate biosecurity agencies about domestic pests of concern to Tasmania.

Silverleaf whitefly

The IRA evaluates the unrestricted risk estimates associated with several different pathways of commodity import at risk of accidentally introducing both the sap sucking insect, Silverleaf Whitefly (Bemisia tabaci Gennadius), and the viral pathogens Tomato Yellow Leaf Curl Virus (Gemini virus) and/or Cowpea Mild Mottle Virus (Carlavirus), into the State of Tasmania.

Silverleaf Whitefly (SLW) is an important pest of a wide range of glasshouse and field crops, ornamentals and weed species worldwide, with a host range extending to several hundred plant species spread over 60 different plant families. SLW can vector over 121 different viruses according to Crop Protection Compendium pest data sheets (CPC - CABI), the most numerous and important of which are the Begomoviruses (Geminiviruses). 

This IRA for Import Requirement 33 – Silverleaf Whitefly, determines whether or not the Import Requirement is technically current, with the key finding that the pest be retained as a List A Pest (Regulated Quarantine Pest) for Tasmania, and therefore must be regulated for in Import Requirement.

  Routine Import Risk Analysis (IRA) for Import Requirement 33 – Silverleaf Whitefly   (3Mb)

Green snail 

The IRA evaluates the unrestricted risk estimates associated with several different pathways of commodity import at risk of accidentally introducing the mollusc, Green Snail (Cantareus apertus (Born 1778)), into the State of Tasmania. The review was undertaken to determine if Import Requirement 25 of the Plant Biosecurity Manual Tasmania remained fit-for-purpose.

The risk analysis determined that the pest be revoked as a List A Regulated Quarantine Pest (RQP) of concern to Tasmania, and re-categorise as an ‘Unwanted Quarantine Pest (UQP)’, by maintaining the pests declaration under Section 8 of the Plant Quarantine Act 1997. As a result, Import Requirement 25 has now been revoked. If the pest should ever be intercepted contaminating imported plants or plant products into Tasmania at the State biosecurity border, then regulatory action will be taken to remove the threat posed.

Fruit Fly Host Produce


Fruit flies are among the most important horticultural pests in the world, rendering a wide range of fruit unfit for sale or consumption. Tasmania is free of pest fruit flies. Entry of host produce to Tasmania has been regulated for many years to support area freedom and maintain export market confidence. Today the Tasmanian Department of Primary Industries, Parks, Water and Environment (DPIPWE) administers eighteen fruit fly phytosanitary protocols called Import Requirements for Queensland fruit fly (Bactrocera tryoni (Froggatt)) and Mediterrenean fruit fly (Ceratitis capitata (Wiedemann)).

  Review of Import Requirements for Fruit Fly Host Produce from Mainland Australia   (4Mb)

Queen Bee Importation


This Import Risk Analysis indicates the unrestricted risk of small hive beetle (Aethina tumida Murray) gaining entry to Tasmania via queen bee importation from interstate exceeds Tasmania's Appropriate Level of Protection (ALOP). As a consequence, regulatory control measures to reduce the risk to a level below or meeting Tasmania's ALOP are identified. Small hive beetle is declared as a List B pest of bees under the Animal Health Act 1995.

  Import Risk Analysis on Queen Bees   (3Mb)

Onion Smut

Tasmania regulates passage of Allium commodities based on the presence of Iris Yellow Spot
Tospovirus (IYSV) and onion smut (Urocystis cepulae Frost) under Import Requirement 11 (IR11) of the Plant Biosecurity Manual Tasmania (PBMTas).

This analysis applies only to part (iii) of the IR and is restricted to commercially produced Allium seed for the purposes of sowing in Tasmania. The term 'commercial' takes account of standard commercial and quality assurance production practices for the seed. The analysis applies only to the disease onion smut (Urocystis cepulae).

  Import Risk Analysis on Onion Smut   (4Mb)


Grape Phylloxera


Import Requirement 10 (IR10) of the Plant Biosecurity Manual Tasmania imposes specific phytosanitary measures on imported vectors of the List A pest, grape phylloxera (Daktulosphaira vitifoliae (Fitch)).

Grape phylloxera is an insect that feeds on the roots of grapevines. The feeding activity of grape phylloxera infestations eventually causes grapevines to die. Grape phylloxera is commonly referred to as the 'world's worst grapevine pest' as infestations can cause extensive damage and can only be eradicated by the removal of all infested grapevines and replacing them with resistant grafted root stock.

  Import Risk Analysis Grape Phylloxera   (4Mb)


Plant Biosecurity
Phone: 1300 368 550

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