Tracking powders for rodent control are typically applied in which location?

• A. Attics
• B. Open floors
• C. Kitchen counters
• D. Wall voids

Answer: (D)

Tracking powders are most effective when they intersect the rodent’s normal pathways, which is why they’re placed where mice and rats travel through hidden spaces. Wall voids put the powder right on those runways—behind baseboards, around pipes, and other gaps inside walls—so rodents brush against it as they move between rooms and floors. The powder sticks to fur and is then ingested during grooming, making the walls a protected, efficient place to target frequent routes while keeping the product away from food areas and people.

Attics can harbor rodents, but placing powder there is less consistent with typical movement paths and can lead to disturbance or uneven coverage. Kitchen counters are food-contact surfaces, posing contamination risks. Open floors offer little shelter or sheltering structure for rodents, so the powder is easily disturbed and less likely to be effective. Wall voids provide the best balance of contact with rodents, safety, and staying power.