Here is the low-down on fruit codes Irradiated or not : via thetruthergirls

Here is the low-down on fruit codes:
4-digit code starting with 4: conventionally grown
4- digit code starting with 3: conventionally grown but irradiated. This most often includes papayas, oranges, and pomegranates. It can also include pineapples, but they don't always have stickers, so you can't always be sure.
5- digit code starting with 9: organic.
5-digit code starting with 8: GMO! Fortunately, they are rare among fresh produce with tags, but packaged fruit like strawberries and tomatoes can be GMO and not have stickers because they are in a box, so I try to make sure that I buy organic or at least local when it comes to those two.

http://www.youtube.com/watch?v=mOzV5SZaLgs&feature=watch_response