Notice of Suspension of Tarpless Container Fumigations
On February 25, 2008, the Animal and Plant Health Inspection Service, Plant Protection
and Quarantine (APHIS, PPQ) suspended tarpless container fumigations. Due to
concerns regarding the efficacy of tarpless container fumigation treatments using methyl
bromide, APHIS has suspended the procedures listed in the APHIS, PPQ Treatment
Manual, Section 2-8: Chemical Treatments-- Fumigants--Methyl Bromide--Special
Procedures for Container Fumigations Without a Tarpaulin. Therefore, tarpless container
fumigations for quarantine purposes conducted under APHIS supervision are no longer
authorized. Until further notice, all container fumigations must be conducted under
tarpaulin in accordance with the Treatment Manual, Section 2-4: Chemical Treatment--
Fumigants--Methyl Bromide--Tarpaulin Fumigation. We will revise the Treatment
Manual, accordingly, to address the suspension of tarpless container fumigations.
The Treatment Quality Assurance Unit of the Center for Plant Health Science and
Technology (CPHST) will conduct a study to determine if the tarpless fumigation
process would be efficacious if performed solely on containers that were pre-certified as
leak-proof, based on pressure testing. The study will also determine the optimum
dosage rate that is needed to maintain adequate gas concentrations of methyl bromide
for an efficacious treatment. Based on the results of the study, we will revise the
Treatment Manual, accordingly.
For information on our APHIS treatment manual;
http://www.aphis.usda.gov/import_export/plants/manuals/ports/treatment.shtml and for
information on the CPHST pressure testing and methyl bromide concentration
degradation study go to: http://www.aphis.usda.gov/plant_health/cphst/tqau.shtml.
If you have further questions, please contact Mr. William Thomas, Associate Executive
Director of Plant Health Programs, PPQ, APHIS, 4700 River Road, Unit 131, Riverdale,
MD 20737-1236; (301) 734-8261.