True or False: ULV spraying involves material that is undiluted in a very small droplet size.

ULV (Ultra-Low Volume) spraying refers to a method of applying pesticides or other substances in a way that uses very small droplet sizes, typically requiring little to no dilution. The droplets produced during ULV spraying are usually less than 50 microns in diameter, allowing for effective dispersal and coverage while minimizing the volume of liquid used.

This method is especially advantageous in public health practices, such as mosquito control, where precise application and distribution of the material are essential for effectiveness and safety. Using undiluted material ensures that the active ingredients are delivered in a concentrated form, maximizing their efficacy while reducing the total amount of liquid being applied to the environment.

In summary, ULV spraying is characterized by its use of undiluted material in small droplet sizes, which contributes to its efficiency and effectiveness in various pest control and public health applications.