Associate Certified Entomologist (ACE) Practice Exam

Which of these is an example of a pest sign?

1. Frass

2. Silk

3. Nests

4. All of the above

The correct answer is: All of the above

The selection of "All of the above" encompasses multiple indicators that suggest the presence of pests in an environment. Frass, which is the droppings of insects, serves as clear evidence of feeding activity and can indicate the species and level of infestation. Silk can be found as threads or webs and is typically produced by certain pests like caterpillars or spiders; its presence is a strong sign of their activity. Nests are physical structures created by pests, such as rodents, wasps, or ants, indicating not only their presence but also their reproductive activities. Each of these elements serves as a tangible sign within pest management, helping professionals identify, locate, and assess pest populations effectively.