Structural Pest Control Applicator Practice Exam

Which of the following is not a process that causes pesticides to break down after application?

1. Photo degradation

2. Microbial degradation

3. Chemical degradation

4. Atmospheric degradation

The correct answer is: Atmospheric degradation

Atmospheric degradation refers to the breakdown of chemicals in the atmosphere, often due to various environmental factors such as sunlight, moisture, and temperature changes. While atmospheric conditions can influence the persistence and effectiveness of pesticides, atmospheric degradation is not typically classified as a direct process that causes the breakdown of pesticides after they have been applied to surfaces or soils. In contrast, photo degradation involves the breakdown of pesticides due to exposure to sunlight, which can accelerate the breakdown process. Microbial degradation occurs when microorganisms in the environment, such as bacteria and fungi, break down pesticide compounds, making them less harmful or ineffective. Chemical degradation happens through chemical reactions that alter the molecular structure of the pesticide, often leading to the formation of less toxic byproducts. Thus, atmospheric degradation is distinct in its indirect influence and is not recognized as a specific breakdown process following pesticide application, making it the correct answer in this scenario.