Which sequence correctly describes the order of tasks when using OsmoFume with HHCB?

• A. Apply OsmoFume, apply HHCB per stick, then plug holes
• B. Plug holes after applying OsmoFume
• C. Apply HHCB before OsmoFume
• D. Apply OsmoFume and plug holes without HHCB

Answer: (A)

The sequence starts with applying OsmoFume because the active fumigant needs to be released and begin circulating through the treated space before any additional substances are added or the area is sealed. If you seal the holes first, gas would be trapped and couldn't distribute properly, reducing effectiveness. If you add HHCB before the fumigant is released, it could interfere with the intended gas flow or distribution. After the fumigant is in place and starting to work, apply HHCB per stick as directed to provide the intended additional effect without obstructing gas movement. Finally, plug the holes to seal the space so the gas concentration is maintained for the required duration. This order ensures safe, effective fumigation and proper containment.