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Fate of Pesticides in the Atmosphere: Implications for Environmental Risk Assessment - Proceedings of a workshop organised by The Health Council of the Netherlands, held in Driebergen, The Netherlands, April 22-24, 1998 (Hardcover, Reprinted from WATER, AIR, & SOIL POLLUTION, 115:1-4, 1999)
Loot Price: R3,096
Discovery Miles 30 960
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Fate of Pesticides in the Atmosphere: Implications for Environmental Risk Assessment - Proceedings of a workshop organised by The Health Council of the Netherlands, held in Driebergen, The Netherlands, April 22-24, 1998 (Hardcover, Reprinted from WATER, AIR, & SOIL POLLUTION, 115:1-4, 1999)
Expected to ship within 10 - 15 working days
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Global pesticide use is currently estimated at approximately 2. 5
billion kg per year (Pimentel eta/. , 1998). To be effective,
pesticides need to persist for a certain period of time. However,
the longer their persistence, the greater the potential for
transport of a fraction of the amount applied away from the target
area. Pesticides are dispersed in the environment by water
currents, wind, or biota. Pesticides can directly contaminate
ground and surface waters by leaching, surface run-off and drift.
Pesticides can also enter the atmosphere during application by
evaporation and drift of small spray droplets, that remain
airborne. Following application, pesticides may volatilise from the
crop or the soil. Finally, wind erosion can cause soil particles
and dust loaded with pesticides to enter the atmosphere. The extent
to which pesticides enter the air compartment is dependent upon
many factors: the properties of the substance in question (e. g.
vapour pressure), the amount used, the method of application, the
formulation, the weather conditions (such as wind speed,
temperature, humidity), the nature of the crop and soil
characteristics. Measurements at application sites reveal that
sometimes more than half of the amount applied is lost into the
atmosphere within a few days (Spencer and Cliath, 1990; Taylor and
Spencer; 1990; Van den Berg et a/. , this issue).
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