Heard of the Dirty Dozen?! Here's latest UK list of fruit & veg most likely to contain residues of pesticides (in order of dirtiness!):
Grapefruit (who would have thought?!!)
Grapes
Limes
Bananas
Peppers
Melons
Beans
Chilli Peppers
Mushrooms
Broccoli
Aubergines
Beans (dried)
Trying to buy organic for these foods is a great way to reduce your dietary exposure to pesticides - you can read more on the Pesticide Action Network UK (PAN UK) website www.pan-uk.org