Associate Certified Entomologist (ACE) Practice Exam

What does thigmotaxis refer to in pest behavior?

1. Navigating via sight

2. Navigating via sound

3. Navigating via touch

4. Navigating via scent

The correct answer is: Navigating via touch

Thigmotaxis refers to an organism's movement in response to touch or physical contact with objects in its environment. In the context of pest behavior, organisms that exhibit thigmotaxis tend to seek out surfaces to contact as a means of navigating their surroundings. This behavior can be observed in various pests, especially those that thrive in environments where structures or obstacles provide shelter or pathways. For instance, certain insects may prefer to move along walls or other surfaces rather than traversing open spaces, as this helps them feel more secure and reduces exposure to predators. The other options pertain to different senses through which organisms can navigate. While sight, sound, and scent play crucial roles in how many insects and pests locate resources, thigmotaxis specifically relates to touch-based navigation. This behavior is significant in pest management because understanding how pests interact with their environment can inform control methods, such as the placement of traps or barriers.