What is the outcome of adding a polyvinyl polymer to a spray mix concerning droplet sizes?

Adding a polyvinyl polymer to a spray mix results in the production of a wider spectrum of droplet sizes, including a greater number of large droplets. Polyvinyl polymers act as surfactants, which modify the surface tension of the liquid. This alteration enables the formation of larger droplets during the application process.

Surfactants can influence the behavior of droplets as they are generated and released from the spray nozzle. By reducing surface tension, the polymer allows the spray mixture's viscosity and cohesion characteristics to change. This leads to improved droplet formation processes that can create a range of sizes, including larger droplets which are essential for reducing drift during aerial applications.

Larger droplets are particularly advantageous in aerial applications as they are less susceptible to environmental factors like wind, helping to ensure that pesticide is delivered more effectively to the target area while minimizing unintended drift. Meanwhile, other response options don't accurately capture the intended effect of polyvinyl polymers, illustrating why they are not the correct choice.