Knowledge Resources Why is 2mm mesh mandatory for bee export in SHB areas? Ensure Biosecurity Compliance with Physical Barriers
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Tech Team · HonestBee

Updated 2 months ago

Why is 2mm mesh mandatory for bee export in SHB areas? Ensure Biosecurity Compliance with Physical Barriers


Fine-mesh netting with a maximum pore size of 2mm is the critical physical firewall required for exporting bees from areas with Small Hive Beetle (SHB). Its mandatory status ensures a secure biosecurity seal that prevents beetles from entering clean shipments or escaping from infested ones during transport.

The specific 2mm limit acts as a "two-way" shield. It preserves the integrity of the shipment by locking out pests while simultaneously protecting the destination ecosystem from potential infestation.

The Mechanics of the Barrier

The 2mm Standard

To comply with export regulations, the netting must feature a maximum pore size of 2mm.

This specific dimension is critical because it is physically smaller than the body of a Small Hive Beetle. Any opening larger than this threshold compromises the security of the entire shipment.

Sealing the Container

The netting is used to strictly wrap or seal transport containers holding live bees, queen bees, and accompanying worker bees.

It serves as a mandatory physical barrier, enveloping the crate to create a closed environment regarding pest movement.

Two-Way Biological Protection

Preventing Infiltration

For clean shipping crates, the netting acts as a shield against the outside environment.

It prevents external Small Hive Beetles from infiltrating the container during transit. This ensures that a pathogen-free shipment remains clean even if it passes through areas where the beetle is prevalent.

Preventing Environmental Contamination

The barrier is equally important for containing potential threats within the shipment.

If a shipment is already contaminated, the netting ensures that beetles cannot escape into non-infested regions along the transport route. This containment is vital for stopping the geographical spread of the pest.

Understanding the Compliance Risks

The Consequence of Incorrect Sizing

Using netting with a pore size even marginally larger than 2mm renders the protection ineffective.

If the mesh is too loose, the physical barrier fails, allowing beetles to breach the container in either direction. This leads to immediate regulatory non-compliance and biosecurity failure.

Integrity is Paramount

The effectiveness of the 2mm pore size relies entirely on the netting remaining intact.

Wraps must be applied securely to ensure there are no gaps or tears. A damaged net, regardless of its pore size, offers no protection against infiltration or escape.

Ensuring Successful Export Compliance

Adhering to this physical standard is the primary requirement for safe bee transport in SHB zones.

  • If your primary focus is material procurement: Verify that your netting supplier guarantees a maximum pore size of 2mm to meet the physical exclusion requirement.
  • If your primary focus is logistics management: rigorous inspections of the wrapping are necessary to ensure the barrier prevents both external infiltration and internal escape.

Precision in netting selection is the single most effective step in ensuring biosecurity during bee transport.

Summary Table:

Feature Requirement Purpose
Pore Size Maximum 2mm Prevents physical passage of Small Hive Beetles
Primary Function Two-way physical firewall Prevents both external infiltration and internal escape
Application Full enclosure/wrapping Creates a closed biosecurity seal for transport crates
Regulatory Risk Any size > 2mm Results in non-compliance and immediate biosecurity failure

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References

  1. . Panel On Animal Health And Welfare. Survival, spread and establishment of the small hive beetle (Aethina tumida). DOI: 10.2903/j.efsa.2015.4328

This article is also based on technical information from HonestBee Knowledge Base .


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