The Environmental Working Group has identified several fruits & veggies that consistently have the lowest amount of pesticide residue.  These are okay to buy 'conventional' when organic is not available:

1. avocados
2. pineapples
3. mangoes
4. kiwi
5. papayas
6. watermelon
7. grapefruit
8. onions
9. sweet corn
10. asparagus
11. sweet peas
12. cabbage
13. eggplant
14. broccoli
15. tomatoes
16. sweet potatoes

I would encourage you to purchase the organic version whenever it is available.  This promotes organic farming and farmers. Organic foods have also not been genetically modified.

Here are a couple of quick facts to help you feel great about an organic purchase:

• Most Americans have traces of at least 6 pesticides in their urine.
• Since WWII pesticide use has risen 10 fold.  During this same time period crop loss due to pests has doubled.