It seems to be effective with some pesticides on apples:
https://pubs.acs.org/doi/abs/10.1021/acs.jafc.7b03118
I cannot find other studies related to other fruits and vegetables.
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2Washing with plain water will reduce pesticides. – Daniel R Hicks Sep 03 '18 at 01:25
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@DanielRHicks I quickly browsed through the article, maybe I do not understand what it really says but I would interpret the diagram Fig. 3.(c) on page 9478 as saying that washing with tap water for 2 minutes reduces the "quantity" of pesticides on the apple from 1350 to 900 or so. So you are correct that it reduced the amount of pesticides, but only by 30%!! Unfortunately the other 2 minute long treatments are similarly ineffective, and it seems that only prolonging the wash really helps. 15 minutes (with NHCO_3, no tap water value available) brings the pesticide amount practically to 0. – KlausN Sep 08 '18 at 08:07