Occurrence of Organochlorine Pesticides in Vegetables Grown on Untreated Soils from an Agricultural Watershed
Published Online: 15 JUL 2005
Copyright © 2005 by John Wiley & Sons, Inc.
How to Cite
Gonzalez, M., Miglioranza, K. S. B., De Moreno, J. E. A. and Moreno, V. J. 2005. Occurrence of Organochlorine Pesticides in Vegetables Grown on Untreated Soils from an Agricultural Watershed. Water Encyclopedia. 3:643–647.
- Published Online: 15 JUL 2005
Organochlorine pesticides (OCPs) are compounds of particular concern in the environment because of their recalcitrance, global transport, distribution, and toxicity, which lead to include them into the group of persistent organic pollutants. The impact of soil contaminants on human health and accumulation in food crops is relevant because of increased dietary exposure of consumers. Organic agriculture has developed rapidly during the last decade on the assumption that such food is free of synthetic pesticides. Although it is likely that lower pesticide residues are found in organically grown vegetables, it has been demonstrated that these produce can reach similar pesticide levels to those conventionally grown. Topographic position, wind dispersion, and neighboring farms are the main factors affecting organic products. Moreover, the use of pine needles as soil amendments can enhance the OCP levels, because they are known to accumulate highly lipophilic pollutants from the atmosphere. Vegetables grown on untreated soils accumulated OCPs efficiently from both air and soil. The main pesticides found involved, endosulfans currently in use, DDTs and HCHs, which are banned or restricted. All OCP levels were below the maximum residue limits (MRL) considered by the Codex Alimentarius. Therefore, ecosystem factors, such as pesticide runoff, drift from pesticide used by neighboring farming, volatilization, leaching, and wash out, impact on the occurrence of OCPs in vegetables grown on untreated soils.
- organochlorine pesticides;
- untreated soils;
- atmospheric transport;
- organic produces