Which vegetables get the most pesticides?

 I have started buying my vegetables at a health food store but the prices
are astronomical, for example, 5 bucks for a cauliflower!

My question is, which veggies would it be more important to get at the
health food store and which, if any, would be ok to get at the Safeway or
whatever?

Are there certain ones that come in for a lot more spraying than others?

Right now I am buying organic carrots, cauliflower, and many other veggies.

Also, I am getting organic chicken raised without pesticides/antibiotics!

Moira