Assaying pesticides is expensive and there is not a test for pesticides as a group because their chemistry differs. Federal agencies sample some imported fruits and vegetables and these data are available in public databases. Washing fruits and vegetable thoroughly will remove almost all residues. Since pesticides are applied in water-based solutions, repeated rinsing should be adequate to  remove  residues. Fruits like citrus are probably better if peeled.

Is there no residual inside the fruits? So do the authorities just check the skin?  What about systemics?

Dear Susan Kirk

In some cases, can be observed pesticides in fruit, but in most cases of pesticide residues that can't be tasted them

Pls. find the attached files

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3907644/

https://www.researchgate.net/publication/286070968_Determination_of_pesticides_and_heavy_metals_in_home-made_and_commercial_fruit_juices_in_the_montenegro_area

http://www.health.act.gov.au/datapublications/reports/food-survey-reports/food-survey-reports-1996-97/pesticide-residues-raw

http://www.top10homeremedies.com/news-facts/simple-tips-tricks-avoid-pesticide-residue-food.html

http://www.rodalesorganiclife.com/food/veggie-wash

http://www.blenderbabes.com/blender-babes-101/blender-babes-how-to-tips/how-to-wash-fruits-vegetables-and-remove-pesticides-with-diy-homemade-recipes/

http://www.rawfoodlife.com/Products/Juicers/Juicing_FAQs/juicing_faqs.html

Hoping this will be helpful            

Regards

Prof. Houda Kawas

Article Determination of pesticides and heavy metals in home-made an...