Bug Scout 1980
Control Spray Drifts
(Tom Turpin, Entomologist, Purdue University)
Oh, he's not spraying here... he's sparying way over there!
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May 17, 1980

Spray drift to non-target areas can be a problem when applying pesticides.  Drift can be due either to vapors moving from the target area or due to the movement of spray during application.  Spray movement, however, is the primary cause of drift problems.

The amount of spray drift is due to droplet size, wind speed, and spray height above the ground or crop.

Drift can be minimized by eliminating the fine spray particles.  This can be done by decreasing pressure or increasing water volume.  However, more spray drift is due to wind problems than to any other factor.  You can't do anything about the wind, but spraying in high wind is sure to create problems.

Remember, good fences and lack of spray drift make good neighbors!

by Tom Turpin, Entomologist, Purdue University

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