Pharaoh ants are particularly difficult to control because

• A. Resistant to Most Baits
• B. Resistant to Most Sprays
• C. Residual Spray Can Cause Colony to Fragment
• D. All of the Above

Answer: (C)

Pharaoh ants have many small subcolonies scattered through a structure, often with multiple queens. When a residual spray is used, it tends to disrupt these subcolonies rather than wipe them out all at once. The disturbance can cause the colony to fragment into several new nests that relocate to different areas, which spreads the infestation and makes complete control much harder. This fragmentation effect is the main reason they’re so difficult to manage. Baits are typically preferred because workers carry the toxic bait back to the nest, affecting multiple subcolonies over time. The idea that they are universally resistant to baits or sprays isn’t accurate, and while sprays can fail to fully eradicate them, the fragmentation risk is the key challenge.