Pitfall traps are used to capture which organisms?

Pitfall traps are used to capture which organisms?

• A. Adult weevils, predaceous ground beetles, ground-dwelling spiders, Collembola, and possibly others such as squash bugs
• B. Flying moths
• C. Leafhoppers on foliage
• D. Aquatic crustaceans

Answer: (A)

Pitfall traps target organisms that move on the soil surface and through leaf litter. By sinking a container into the ground, crawling arthropods accidentally fall in and are collected, making these traps ideal for monitoring ground-dwelling insects and related predators. The groups listed—adult weevils, predaceous ground beetles, ground-dwelling spiders, and Collembola (springtails), with squash bugs as another example—are all typically found moving across the soil or crop residue, so they are the ones you’d expect to capture. Flying moths usually stay airborne and don’t encounter the trap; leafhoppers on foliage stay on plants rather than the ground; aquatic crustaceans live in water, not on land. Therefore, pitfall traps are used to capture those ground-dwelling arthropods.

Pitfall traps target organisms that move on the soil surface and through leaf litter. By sinking a container into the ground, crawling arthropods accidentally fall in and are collected, making these traps ideal for monitoring ground-dwelling insects and related predators. The groups listed—adult weevils, predaceous ground beetles, ground-dwelling spiders, and Collembola (springtails), with squash bugs as another example—are all typically found moving across the soil or crop residue, so they are the ones you’d expect to capture. Flying moths usually stay airborne and don’t encounter the trap; leafhoppers on foliage stay on plants rather than the ground; aquatic crustaceans live in water, not on land. Therefore, pitfall traps are used to capture those ground-dwelling arthropods.