Minnesota Pesticide Applicator Practice Test

Adding water last when filling a mixing tank is important because it helps ensure that all components mix properly and effectively. By adding water last, you allow the pesticide and any dry ingredients to properly dissolve or disperse in the tank, which can help improve the overall efficacy of the mixture.

When water is added first, it can cause certain substances to clump together or not disperse evenly, leading to an inefficient mixture. This means that the pesticides may not be distributed properly, potentially causing uneven application. Conversely, adding water after other materials ensures that the tank's contents are mixed thoroughly without the risk of clumping.

In this case, while the options present aspects related to mixing and dissolving agents, the correct choice points to the importance of mixing practice rather than specific requirements for surfactants or dispersible granules. It's crucial for users to understand the benefits of their mixing order to achieve optimal results in pesticide application.