Which of the following is NOT an example of pests that non-residual pesticides would be considered for?

• A. Bed Bugs
• B. Termites
• C. Flies (adult stage)
• D. Cockroaches

Answer: (D)

Non-residual pesticides work by delivering a quick kill on contact without leaving a lasting chemical presence. This makes them useful when you want fast relief from active pests and when a long-lived residue isn’t desirable or necessary in that area. For flying insects that are active in a space, a quick spray can knock down the adult population right away, giving immediate relief. For bed bugs, seeing live bugs allows a contact spray to rapidly reduce those individuals present at the moment, while other methods handle hiding bugs and re-infestation over time. In some approaches to termites, a non-residual spray might be used to suppress activity in accessible spots as part of an overall plan, but true termite control typically relies on longer-lasting residual treatments to interrupt colony activity. Cockroaches, however, tend to hide in cracks and crevices and can recolonize quickly after a short-term spray, so relying on a non-residual product alone isn’t enough for reliable, longer-term control.