Timber products with or without bark require methyl bromide fumigation prior to export in accordance with T404 (wood products including containers for treatment for pest list under table 5-5-2) under the USDA treatment manual.

https://www.aphis.usda.gov/import_export/plants/manuals/ports/downloads/treatment.pdf.





T404-b-1-1 – Methyl bromide at NAP tarpaulin or chamber

Temperature (degrees Celsius)	Dosage rate (grm/m3)	Minimum concentration readings (grams/m3) at:
		0.5 hr	2 hrs	12 hrs	24 hrs
21 or above	48	36	30	27	25
10 - 20	80	60	51	46	42

Note:

• If fumigation is conducted in a close-door container take the first reading at 1 hour instead of 0.5 hours.
• If fumigation is conducted in a close-door container take the second reading at 2.5 hours instead of 2 hours.
• If the 4-hour and 16-hour readings would occur outside of normal working hours, then the fumigation may be extended to a total of 24 hours, instead of 16. In that case, the 24 hour minimum concentration reading would be 25 (for the initial 48 grm/m3 dosage), or 42 (for the initial 80 grm/m3 dosage).

T404-b-1-2 – Methyl bromide in 66.4 cm (26 inch) vacuum chamber

Temperature (degrees Celsius)	Dosage rate (grm/m3)	Exposure period (hours)
21 or above	64	4
10 - 20	64	5