Global · Case study

Grain Trade Australia, Industry Fumigation Protocol for Stored Grain

Australia (national)Ongoing

Grain Trade Australia (GTA) provides industry guidance on phosphine fumigation management for grain export (Grain Trade Australia, 2022). GTA guidance covers insect resistance management, pre-shipment fumigation required by importing countries, and chemical residue limits (Grain Trade Australia, n.d.a). GTA does not operate port fumigation. The protocol is guidance for the grain supply chain, which includes export terminals, but it does not refer to ports specifically.

The GTA Fumigation Protocol, prepared by the National Working Party on Grain Protection, notes that resistance to fumigants such as phosphine is increasing in both frequency and strength. It asks industry to use integrated pest management, including cleaning storages before grain receival, following all label directions and not breaking fumigation periods. It also asks industry to understand importing country requirements for chemicals used, residue limits and freedom from live stored grain insects (Grain Trade Australia, 2022).

In Australia, the Australian Pesticides and Veterinary Medicines Authority (APVMA) registers fumigant products and approves labels, while States and Territories control chemical use beyond the point of retail sale (Grain Trade Australia, n.d.a). Importing countries may specify the fumigant and rate, and government certification is usually needed to confirm the treatment. The Department of Agriculture, Fisheries and Forestry MICoR database sets out pre-shipment fumigation requirements by market and commodity (Grain Trade Australia, n.d.a). DAFF guidance notes that mandatory treatments are set by the importing country's plant protection organization and that phosphine is one of the most relied upon fumigants for stored grain (DAFF, 2023). Insect resistance to phosphine is a growing concern, and Safe Work Australia is lowering the phosphine 8-hour workplace exposure limit from 0.3 ppm to 0.05 ppm, with a transition period ending on 30 November 2026 (Grain Trade Australia, n.d.b).

Transferability

For DMC ports importing Australian grain, the GTA framework provides visibility into Australian fumigation practices. For ASEAN grain exporters (for example, Thailand, Viet Nam for rice), similar principles apply adapted to local commodity, regulatory, and infrastructure contexts. Transferable elements include, among others, integrated pest management, resistance management, label compliance, and documentation for biosecurity certification.

Sources

All information used for this case study was based on publicly available resources.