Fumigation

Definition

A pest-control method employing gaseous pesticides (fumigants) to eliminate arthropods, nematodes, or other pests within an enclosed space, commodity, or soil profile. The fumigant acts through respiratory uptake or cuticular penetration, achieving mortality by suffocation, metabolic disruption, or neurotoxicity. In entomology, fumigation is distinguished from surface spraying or baiting by its reliance on gas-phase distribution and complete enclosure to maintain lethal concentrations.

Etymology

From Latin fumigare, to smoke, from fumus (smoke) + agere (to drive)

Example

Phosphine fumigation of grain silos to eradicate Sitophilus weevils and Tribolium flour beetles in stored cereals; methyl bromide (now restricted) was formerly standard for quarantine treatment of wooden pallets to prevent longhorn beetle (Cerambycidae) introduction.

Synonyms

• gas treatment

Related Terms

• Fumigant
• Quarantine
• stored-product entomology
• Integrated Pest Management
• aeration
• residue
• toxicology
• hermetic storage
• phosphine
• sulfuryl fluoride

Usage Notes

Fumigation requires gas-tight enclosures (sheets, chambers, or sealed structures) and post-treatment aeration to remove residues. It is non-residual, making it suitable for sensitive commodities but ineffective against reinvasion. Contrast with fogging (aerosol droplets) and spraying (liquid deposition). Specialist use distinguishes structural fumigation (buildings), commodity fumigation (grains, timber), and soil fumigation (agricultural nematode/arthropod control). Regulatory restrictions on ozone-depleting or high-toxicity fumigants (e.g., methyl bromide) have driven adoption of phosphine, sulfuryl fluoride, and controlled-atmosphere alternatives.