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Interaction Between Air Spray Drift And Climatic Conditions Creating Drift Map Related To The Aerial Application Of Pesticides Using Low Volumes In Brazil
F. Baio, U. Antuniassi
ASABE

Between 30 to 50% of the pesticides total applied over agricultural areas can be lost by the air, depending of the applying conditions, by the spray drift action. This spray drift problem is increased when the field is too close to the urban locations, bringing environmental contamination, and when the application is made with oil on the tank mixture. The society demands by a bigger discussion over this problem. Spraying drift mixtures containing oil can travel over long distances, once it cannot evaporate. The purpose of this work was to create a map showing the spray drift related to the aerial application of pesticides using low volumes in the Brazilian “cerrado” condition. The map was obtained by the use of passives samples, which recovered the sprayed solution with a chemical tracer dye quantified in lab condition. The method allowed the creation of the map which illustrated the spray drift over the surrounding areas. The spray drift traveled into the wind direction to a distance of 2 km. The absence of the wind during the spray application increased the spray drift.

Keyword: spray drift, pesticide, contamination