What is a gas or vapor used for pest control known as?

A gas or vapor used for pest control is known as a fumigant. Fumigants are typically used to eliminate pests from enclosed spaces, such as buildings or storage areas, by penetrating materials and reaching pests that might be hidden. This method ensures that the treatment is effective against a wide range of pests, including insects and rodents, by utilizing volatile substances that can circulate in the air.

Fumigants are distinguished from other pest control substances. For instance, fungicides specifically target fungi and are used to control mold and mildew. Insecticides are designed to kill insects, but they usually come in liquid or powder forms rather than as gases or vapors. Herbicides focus on controlling unwanted plants or weeds and do not apply to pest control in the same context as fumigants. Overall, the unique gaseous properties of fumigants make them particularly effective for broad treatment applications in pest management.