Which of the following is NOT considered a "mechanical" treatment method?

The correct response identifies that removing tree limbs touching the roof line is not categorized as a "mechanical" treatment method. Mechanical treatment methods typically involve physical actions or devices that directly manage pest problems, often through trapping, exclusion, or sanitation. These methods aim to limit pest access or reduce their populations.

Setting traps for rodents embodies a mechanical approach because it uses physical devices to capture and control pest populations. Removing standing water is also a mechanical method since it physically eliminates potential breeding grounds for pests like mosquitoes. Sealing cracks in walls is considered a mechanical treatment too, as it involves physically blocking entry points for pests.

While removing tree limbs is a beneficial practice for pest management, particularly in creating a barrier to pests that might use trees to access structures, it doesn’t fall into the same category as the other actions listed. This activity is more about overall maintenance and prevention rather than a direct mechanical intervention targeting pests.