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Chapter 20 Overspray and drift

Terms in this set (6)

define Overspray and drift.
Overspray is a direct application of pesticide beyond the boundaries of targeted area. Drift is the movement of pesticide in the air currents beyond the boundaries of the targeted area.
explain Wisconsin regulations regarding Overspray and drift
What is readily visible or Moves to areas outside the target area and either causes actual harm or could conceivably cause harm to persons, property, or the environment.
recognize that pesticide labels sometimes provide specific products instructions regarding drift.
be aware of what the label says.
compare the difference between particle drift and vapor drift
particle drift is spray droplets and vapor drift is fumes that can drift further and stay longer in the air and land.
Describe the relationship to drift with weather conditions, wind, air stability,temperature and humanity.
wind speed the distance droplets travels is increased with wind velocity. spray in early morning or even when wind speed is lowest. Air stability determines the distributions of spray droplets. best with wind is 3 to 10mph. Temperature inversions provide the greatest opportunity for drift. when warm and colder air rise and switch. Humidity can affect the size in water droplet which in turn affects drift of pesticide.
Describe the relationship to drift with application related factors that influence droplet size.
Smaller droplets take longer to settle and are thus subject to effects of wins for longer period of time.
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