Associate Certified Entomologist (ACE) Practice Exam

What method can be used to deny entrance to pests through small holes?

1. Using traps

2. Sealing with silicone caulk

3. Using pesticides

4. Removing food sources

The correct answer is: Sealing with silicone caulk

Sealing with silicone caulk is an effective method to deny pests entrance through small holes. This material serves as a barrier, effectively closing gaps and cracks that pests could exploit to gain entry into a structure. Small openings, such as those around windows, doors, and utility lines, are common access points for insects and rodents. By applying silicone caulk, you create a smooth, impermeable surface that prevents these pests from entering. Using traps can be helpful for monitoring or capturing pests that have already entered an area, but it does not physically block access points. Pesticides are typically used to kill or repel pests already present in an environment, rather than preventing their entry. Removing food sources can deter some pests, but it won't physically block their access to the structure. Sealing with caulk is a proactive, preventive measure that directly addresses the entry points of potential pests.