Which of the following is NOT a factor in determining pesticide effectiveness?

The determination of pesticide effectiveness relies on several key factors that influence how the pesticide interacts with the target pest and the environment. The color of the application equipment does not have a direct impact on the efficacy of the pesticide being applied.

Application rate is crucial; using the appropriate amount ensures that there is enough pesticide present to control the pest population effectively. Pest population size is also significant; a larger pest population might require a more potent application or a different strategy for effective control. Additionally, environmental conditions, such as temperature at the time of application, play a critical role since they can affect both pests and the chemical's performance, including its volatility and degradation.

In contrast, the color of the application equipment does not affect the chemical properties of the pesticide or its ability to target and control pests. Therefore, it is accurately identified as not being a factor in determining pesticide effectiveness.