What peculiar characteristic makes the larvae and pupae of Coquillettidia perturbans difficult to find and control?

• A. They have an air siphon that pierces plant roots and stems to breathe inside plant tissue
• B. They come to the surface to breathe
• C. They breathe through gills
• D. They do not require oxygen

Answer: (A)

The key idea is that these larvae have a breathing method that lets them stay hidden in underwater vegetation. Coquillettidia perturbans uses a specialized air siphon that actually pierces plant roots and stems to reach air stored inside the plant tissue. By drawing oxygen from that plant air, they don’t need to come to the surface, so they remain concealed in the vegetation and are much harder to find and kill with surface treatments. This makes sampling and control more challenging, because traditional methods target larvae that are at or near the surface or exposed in open water. In short, their association with aquatic plants and their plant-tissue air access keep them out of sight and out of reach of many standard control approaches.