Which of the following is a sign of a cockroach infestation?

• A. Strong citrus odor
• B. Visible nests in cabinets
• C. Sticky floors
• D. Strong oily smells

Answer: (D)

A strong oily odor signals a cockroach infestation. When roaches are present in numbers, they release pheromones and oily secretions that create a distinct musty, oily smell, especially in dark, damp spaces like behind appliances, under sinks, or inside cabinets. This odor becomes more noticeable as the population grows and can persist even when you don’t see many roaches.

The other options aren’t typical signs on their own. A citrus odor isn’t commonly linked to cockroaches and may come from cleaners or other sources. Visible nests in cabinets aren’t how roaches operate; they hide in cracks and crevices rather than building nests. Sticky floors can result from spills or cleaning residue and don’t reliably indicate an infestation. If you notice that oily odor, it’s a good cue to inspect and start pest control steps such as sealing entry points, cleaning thoroughly, and setting traps or contacting a professional.