Its one of the most common forms of pesticide application, especially in pest and termite  control, done with  the  use of  mechanical  sprayers. Hydraulic sprayers consists of  a tank, a pump, a  lance (for single nozzles)  or  boom, and  a nozzle (or multiple nozzles). Sprayers  convert  a pesticide formulation, often containing 

a  mixture of water (or  another  liquid  chemical  carrier, such  as  medium)  and chemical,  into  droplets, which  can  be  large  rain - type  drops  or  tiny  almost-invisible particles.This conversion is accomplished by  forcing  the spray  mixture through  a  spray  nozzle  under  pressure. The size  of droplets can  be  altered through  the  use  of  different  nozzle sizes, or  by  altering  the  pressure  under which it is forced, or a combination of both. Large droplets have  the  advantage 

of being less susceptible to spray drift, but require more  water  per unit  of  land covered. Due  to  static  electricity, small  droplets  are able  to maximize  contact with  a  target  organism, but very still wind conditions are required.