What happens to a pesticide after application?
With time, the pesticide may (1) break down (2) be redistributed within the application site or (3) move off site. Off site movement includes movement to groundwater, surface water, and the atmosphere. Off site movement also includes pesticide on a crop or livestock when it is removed from the site. Break down and movement occur simultaneously. In many cases, the two processes together determine pesticide dissipation at the point of measurement.