Other items making the list of the 12 most polluted products, being dubbed “the dirty dozen”, include pears, beans (dried and fresh), okra, lettuce, carrots and mango.
These foods contained traces of a total of 122 different pesticides.
Researchers found that 80 per cent of grapes, herbs and oranges tested contained more than one pesticide and just one-kilogram sample of sultanas contained 25 different chemicals.
Of the 122 chemicals identified, 61 per cent are classed as “ highly hazardous ” by the UN, PAN said. Additionally, 47 have links to cancer and 15 contain “reproduction or developmental toxins” that can have an adverse effect on sexual function and fertility.