Associate Certified Entomologist (ACE) Practice Exam

What are microbials primarily used for in pest management?

1. Fertilizing crops

2. Controlling pests

3. Enhancing plant growth

4. Improving soil health

The correct answer is: Controlling pests

Microbials are primarily used in pest management for their ability to control pests, especially in an environmentally friendly manner. This method involves the use of microbial pests, such as bacteria, fungi, or viruses, which can target and reduce pest populations. Specific examples include the use of Bacillus thuringiensis (Bt), a bacterium that produces toxins harmful to certain insect larvae, thereby effectively reducing their numbers without affecting non-target organisms and beneficial insects. While other options may seem relevant in broader agricultural contexts, they do not accurately reflect the primary role of microbials in pest management. For instance, while they may enhance plant growth and improve soil health indirectly through interactions with plant roots or soil organisms, their main function in an integrated pest management program is specifically focused on pest control.