End of the 2025-26 BMSB Risk Season: What It Means for Importers and Supply Chains
As of 1 May 2026, the 2025-26 Brown Marmorated Stink Bug (BMSB) risk season has officially come to a close. For those across the end to end logistics chain, from freight forwarders and customs brokers to importers and shipping lines, this marks an important shift in seasonal biosecurity requirements.
During the BMSB season, heightened measures are applied to cargo shipped from identified target risk countries to prevent the introduction of this highly invasive pest into Australia. With the season now concluded, goods shipped onboard vessels departing on or after 1 May 2026 are no longer subject to these seasonal BMSB intervention requirements.
However, it’s not a complete reset. Cargo classified as target high-risk goods, manufactured in or shipped from target risk countries, and loaded between 1 September 2025 and 30 April 2026, will still be subject to BMSB measures, regardless of when the goods arrive in Australia. This is a key detail that continues to impact cargo already in transit or recently shipped.
The end of the BMSB season may ease some operational pressure, but it doesn’t remove the broader responsibility. Importers must continue to ensure their cargo is free from biosecurity risk material year-round. Australia maintains some of the strictest biosecurity controls globally, and compliance remains critical to avoiding delays, inspections, or potential re-export.
From a practical standpoint, this seasonal transition may improve lead times, reduce treatment requirements, and ease congestion at key origin points. But vigilance is still required, particularly for shipments that fall within the seasonal window but have yet to arrive.
For supply chain stakeholders, this is also a timely reminder of the importance of planning, clear communication with overseas suppliers, and understanding seasonal regulatory frameworks that can impact cargo flow.
As always, staying informed and proactive is key to keeping your supply chain moving efficiently.