Pest Control Technician Practice Exam

What does biological control involve?

1. Planting resistant varieties

2. Manipulation of soil properties

3. Introduction of natural enemies

4. Use of synthetic pesticides

The correct answer is: Introduction of natural enemies

Biological control primarily involves the introduction of natural enemies to manage pest populations. This method leverages the natural predation and parasitism relationships that exist in ecosystems. For instance, releasing a specific predator insect that feeds on a pest can significantly reduce its numbers without the need for chemical pesticides. This approach is viewed as environmentally friendly, as it helps maintain ecological balance and reduces the likelihood of pesticide resistance developing among pest populations. In contrast, the other methods mentioned do not align as closely with the definition of biological control. Planting resistant varieties refers to cultivating plants that are naturally less susceptible to pests, which is a form of cultural control rather than biological control. Manipulating soil properties can improve plant health and resilience against pests, but it doesn't involve the use of biological agents. Lastly, the use of synthetic pesticides, while a common approach in pest management, introduces artificial chemicals rather than utilizing natural ecological interactions.