The Australian Walnut Industry Association represents the biosecurity interests of walnut producers and the industry. They are members of Plant Health Australia and signatories to the Emergency Plant Pest Response Deed. Their responsibilities include:

  • biosecurity planning and implementation at the national and farm levels
  • liaising with federal and state governments on trade issues
  • funding and supporting biosecurity initiatives
  • participating in national committees and response efforts in an emergency.

Industry overview

In 2013–14, walnut production was valued at $47 million (LVP). In 2015, the production of Australian walnuts was in excess of 8,000 tonnes (in-shell).

The Australian walnut industry operates in most states of Australia. The industry has grown significantly in recent years due to growth in the establishment of large scale commercial plantings. The area currently under cultivation is approximately 2,980 hectares. Production is expected to increase dramatically in the next five years as new orchards mature and come into bearing.

Walnut production in Australia has been steadily increasing, and local production of in-shell walnuts can satisfy all domestic consumption. About 70 per cent of Australia’s walnut production is exported with greatest demand for in-shell walnuts in China, Turkey and Italy.

In December 2015 an Industry Development Officer was appointed with a view to further improving the industry biosecurity program.

Aspects of biosecurity are well embedded in the Australian Walnut Industry Five Year Strategic Plan 2015 to 2020.

Annual value of walnut production 2007–14 (LVP)

Walnuts graph

Distribution of walnut production by state and territory 2013–14 (based on LVP)

Walnut pie chart

Tree nut IBPBiosecurity Plan for the Tree Nut Industry

Biosecurity planning provides a mechanism for the almond industry, government and other relevant stakeholders to assess current biosecurity practices and future biosecurity needs. Planning identifies procedures that can be put in place to reduce the chance of pests reaching our borders or minimise the impact if a pest incursion occurs.

 The Biosecurity Plan for the Tree Nut Industry outlines key threats to the industry, risk mitigation plans, identification and categorisation of exotic pests and contingency plans. For a copy, please contact PHA on 02 6215 7700 or email admin@phau.com.au.

Nuts PostcardPostcard

Promotional item to support the exotic plant pest hotline 1800 084 881.

Exotic pests (not in Australia)

The following is a list of high priority exotic pests of walnuts. These pests were identified during the development of the Biosecurity Plan for the Tree Nut Industry in consultation with industry, government and scientists. They have been assessed as high priority pests based on their potential to enter, establish, and spread in Australia (eg environmental factors, host range, vectors) and the cost to industry of control measures.

PHA has a range of fact sheets, contingency plans and diagnostic protocols relevant to these pests. Pest risk review documents are also available for some pests. Please contact PHA on 02 6215 7700 or email admin@phau.com.au for more information.

Endorsed National Diagnostic Protocols are available from the National Plant Biosecurity Diagnostic Network webpage.

Common name Scientific name EPPRD Category Fact sheet Contingency plan Diagnostic protocol
Brown-marmorated stink bug Halyomorpha halys FS
Gypsy moths Lymantria dispar FS FS FS CP
Khapra beetle Trogoderma granarium 2 FS CP
Navel orangeworm Amyelois transitella 3 FS
Verticillium wilt Verticillium dahliae (exotic defoliating strains) 3 FS
Xylella fastidiosa Xylella fastidiosa including X. fastidiosa subsp. multiplex and pauca 2 FS FS FS FS FS CP DP

Other pests

The following is a list of documents for other exotic pests of walnuts. Please note that this is not a complete list of walnut pests: rather it includes pests for which documents exist in the Pest Information Document Database.

Some of the documents presented here are not  tailored to the walnut industry and are included for information only.

Common name Scientific name EPPRD Category Fact sheet Contingency plan Diagnostic protocol
Citrus longicorn beetle Anoplophora chinensis FS CP
European canker Neonectria ditissima FS
False codling moth Thaumatotibia leucotreta syn Cryptophlebia leucotreta 2 FS CP
Filbertworm Cydia latiferreana FS
Glassy-winged sharpshooter Homalodisca vitripennis FS FS FS FS FS CP
Gypsy moths Lymantria dispar FS FS FS CP
Omnivorous leaf roller Platynota stultana FS
Orange tortrix Argyrotaenia citrana FS
Pacific spider mite Tetranychus pacificus FS
Strawberry spider mite Tetranychus turkestani FS
Texas root rot Phymatotrichum omnivorum 2 FS FS
Walnut husk fly Rhagoletis completa FS