Fumigation is a method of pest control or the removal of harmful micro-organisms by completely filling an area with gaseous pesticides—or fumigants—to suffocate or poison the pests within. It is used to control pests in buildings, soil, grain, and produce. Fumigation is also used during the processing of goods for import or export to prevent the transfer of exotic organisms. Structural fumigation targets pests inside buildings, including pests that inhabit the physical structure itself, such as woodborers and drywood termites. Commodity fumigation, on the other hand, is also to be conducted inside a physical structure, such as a storage unit, but it aims to eliminate pests from infesting physical goods, usually food products, by killing pests within the container which will house them. Each fumigation lasts for a certain duration. This is because after spraying the pesticides, or fumigants, only the pests around are eradicated.

धूमन कीटों को नियंत्रित करने की एक प्रणाली है। इस प्रणाली में किसी क्षेत्र को पूर्णतः गैसीय कीटनाशक (fumigants) से भर दिया जाता है जिसके विषाक्त प्रभाव से कीट नष्ट हो जाते हैं। धूमन का प्रयोग भवनों के अन्दर, जमीन पर, अनाज आदि में किया जाता है।