In uk.rec.gardening Oz wrote:
: Tim Tyler writes

: - http://www.caes.state.ct.us/FactShee...y/fsac003f.htm
:
:Washing with water /is/ an effective method of removing pesticide residues
:from the surface of produce.

: No actual figures were given, which is very odd.

: After all 'significantly reduced' in this context means a reduction from
: 100 parts to 95 parts, whilst for most people they would hope it means
: to under 50%.

The FDA gave a figure of 99% for washing for a fungicide off tomatoes:

``A 1990 report in the EPA Journal by three chemists from the agency, Joel
Garbus, Susan Hummel, and Stephanie Willet, summarized four studies of
fresh tomatoes treated with a fungicide, which were tested a harvest, at
the packing house, and at point of sale to the consumer. The studies
showed that more than 99 percent of the residues were washed off at the
packing house by the food processor.''

- http://vm.cfsan.fda.gov/~dms/qa-pes4.html

This is only relevant for produce that hasn't been washed, of course.
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|im |yler http://timtyler.org/