I choose to eat locally grown, organic produce as often as possible...the problem is I live in Ohio and bananas don't grow here (at least not that I'm aware of) and I like bananas, so if not local at least organic... but sometimes, if not organic I avoid at all cost because of the high amount of residual pesticides.
Here's a list of the Top Twenty Worst that I have memorized and only buy organic:
1. Celery (no, it's not as pretty as the chemically treated one)
7. Bell Peppers
9. Kale/Collard Greens
15. Green Beans
18. Summer Squash
There's more (I think the full list goes to 50 if you google pesticides and fruit/vegetables) and one that didn't make the list is beets, which I only buy organic - not because of pesticides but because of GMO's (genetically modified organisms) which I try to avoid like the plague...