Oklahoma Service Technician Practice Exam

Which of the following is NOT a characteristic of a very coarse droplet size?

1. Reduces the chance of drift

2. Increases efficacy at close range

3. Is effective for small target areas

4. Minimizes evaporation

The correct answer is: Is effective for small target areas

A very coarse droplet size is characterized by specific behaviors during pesticide application. One of the main features of very coarse droplets is that they tend to reduce the chance of drift. This is largely due to their larger size, which makes them less susceptible to being carried away by wind compared to smaller droplets. Additionally, very coarse droplets are more effective at delivering products to targets that are located close to the application site, which is why they can enhance efficacy at close range. These larger droplets are also less prone to evaporation because they maintain their larger size longer in the air before dispersing, allowing more of their contents to reach the target without losing efficacy to environmental factors. However, when it comes to effectiveness in very small target areas, larger droplet sizes are less suitable. This is because very coarse droplets may not be able to effectively cover small or intricate areas, leading to uneven application and potentially less effectiveness in targeting pests or diseases in those locations. Therefore, stating that very coarse droplets are effective for small target areas is inaccurate.