A portable apparatus for the collection of bedbugs, their eggs, their larvae, their debris, and their feces has a vacuum-producing motor disposed within a housing. A collection port is used to draw the bedbugs into the housing along a flow path to a collection chamber featuring a variable environment sufficient to kill the bedbugs. The collection chamber can be heated or cooled, can contain insecticidal substances, or ultraviolet radiation sufficient for killing the collected bedbugs. The flow rate and temperature ranges are adjustable to create sufficient heat and time of contact to kill selected organisms. The apparatus is especially useful for treating bedbug infestations in their natural environment without the need for toxic chemicals, long-term treatments that make the space being treated uninhabitable and other more extreme treatment regimens.