Once your sprayer is calibrated, its delivery rate will remain constant.

The correct understanding of the statement hinges on the fact that while calibration can establish an initial delivery rate for a sprayer, various factors can affect that delivery rate over time and under different conditions.

Environmental factors such as temperature, humidity, and wind can influence how a sprayer performs. For example, increased temperatures can cause liquids to evaporate more quickly, potentially altering the concentration of the solution being applied. Similarly, changes in pressure or mechanical issues with the sprayer can lead to variations in how much product is actually being delivered.

Therefore, it's critical to periodically check and, if necessary, recalibrate the sprayer to ensure consistent delivery rates, especially if external conditions change or if the equipment is used frequently. This highlights the importance of ongoing maintenance and monitoring to ensure optimal pest control application.