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A study in the May 1, 2002 edition of the London-based journal Food Additives and Contaminants underscores the fact that an "organic" designation doesn't guarantee that a food is pesticide-free.
The study concludes that almost a quarter of all organic produce may contain trace amounts of pesticides, including long-banned chemicals such as DDT. The report analyzed US government-collected data and found pesticide residue on 23 percent of organic produce and on 75 percent of conventionally grown produce.
According to Brian Baker, PhD, a researcher at the Organic Materials Review Institute in Eugene, Oregon, the problem is beyond the control of organic farmers. Most residues in organic samples appear because of pesticide spray drift from adjacent fields, or soil or irrigation-water contamination, Baker says.
Many residues found are of organochlorine pesticides, chemicals--including DDT and chlordane--that plants can soak up from the soil decades after the products are used, the study reports.
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