Oklahoma Service Technician Practice Exam

What factors should be considered for outdoor pesticide application?

1. Type of crop only

2. Weather conditions only

3. Soil factors, moisture, humidity, and wind

4. Economic factors and market demand

The correct answer is: Soil factors, moisture, humidity, and wind

When considering outdoor pesticide application, it is crucial to evaluate a combination of factors that impact both the effectiveness of the pesticide and the safety of the surrounding environment. The correct response encompasses soil factors, moisture, humidity, and wind, all of which play significant roles in how pesticides function and their potential drift or runoff. Soil factors are important because different types of soil can affect how quickly pesticides degrade or are absorbed, which ultimately influences their efficacy. For instance, sandy soils may allow for faster leaching of chemicals, while clay soils may hold onto them longer but restrict their movement to the target area. Moisture levels are vital as they determine how well the pesticide is absorbed by the plants and how the chemical behaves in the soil. High moisture can potentially lead to runoff, especially during rain events, which can contaminate water sources. Humidity is another critical consideration; high humidity can enhance the effectiveness of some pesticides, while low humidity might lead to rapid evaporation of spray droplets, reducing the pesticide’s effectiveness. Wind is particularly important when applying pesticides as it can carry the pesticide away from the target area, leading to environmental contamination and unintended effects on non-target organisms. Adequate wind conditions should ensure that the application is effective while minimizing drift. Overall, the