MDARD Michigan Core Pesticide Applicator Practice Exam

What is the first step in the correct order for tank mixing pesticides?

1. Fill the tank 1/5 to 1/2 with carrier and begin agitation

2. Add emulsion products

3. Add surfactants if needed

4. Add suspension products wet first

The correct answer is: Fill the tank 1/5 to 1/2 with carrier and begin agitation

The first step in the correct order for tank mixing pesticides is to fill the tank 1/5 to 1/2 with the appropriate carrier and begin agitation. This step is crucial because it ensures that the carrier—usually water or another diluent—is adequately mixed and allows for effective dispersion of the subsequent products added to the tank. Starting with the carrier and establishing agitation ensures that the tank's contents can mix uniformly, which is vital for the effective performance of the pesticides. If the carrier is not added first and agitation is not initiated, there is a risk of poor mixing or even the formation of clumps, leading to an ineffective solution that may not properly control pests. Once the carrier is established and agitating, the subsequent steps, such as adding different types of pesticide formulations, can be done in the correct order to promote optimal mixing and function. This foundational step sets the stage for a successful tank mix that maximizes efficacy and minimizes problems during application.