Question: What is chlorfenapyr?
Answer: According to the cited reference, “Chlorfenapyr is the only pyrrole pesticide currently registered for use against bed bugs. The compound is a pro-insecticide, i.e. the biological activity depends on its activation to form another chemical. The new chemical disrupts certain functions in the bed bug's cells, causing its death.” (https://www.epa.gov/bedbugs/pesticides-control-bed-bugs;accessed; January 2017)
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