A new best management practice (BMP) guide for phosphine use in stored grain fumigation has been released, providing a resource for the Australian grains industry.
The Phosphine Best Management Practices: Disinfesting Stored Commodities guide was published in May 2025 by the Grains Research and Development Corporation (GRDC) in collaboration with the Queensland Government Department of Primary Industries, under investment DAQ2209-001RTX.
NSW Department of Primary Industries and Regional Development (NSW DPIRD) research entomologist and co-author of the publication Dr Jo Holloway said the guide had been developed by experts with extensive experience in stored grain research, bulk handling and extension.
“The BMP guide is designed to support industry-wide adoption of best practices to help sustain the effectiveness of phosphine as a critical fumigant. The guide brings together all available information on phosphine use into a single authoritative source,” Holloway said.
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“Phosphine is widely used because it’s cost-effective, easy to apply, leaves no residues and is accepted in all markets, but its continued effectiveness depends on how we use it. This guide provides the knowledge and tools needed to manage resistance and ensure phosphine remains viable for the long term.”
The guide features contributions from post-harvest grain protection experts, including specialists from the NSW DPIRD.
The guide covers phosphine’s mode of action, fumigation practices, formulations and ventilation times, how resistance develops and can be managed, as well as operational and regulatory constraints.
Dr Holloway said the guide is relevant to anyone involved in managing insect infestations in stored grain, from growers to bulk handlers, and is also a valuable resource for students and researchers.
“By following the BMPs outlined in this guide, the industry can work together to protect the future of phosphine and maintain Australia’s strong reputation in postharvest commodity protection,” she said.
The BMP guide is available for download from the GRDC website, where hard copies can also be requested.
