Mary sent me this. I'm posting it because the apples I bought today start with "4". Personally, I'm not worried about the genetically modified.
For anyone interested: Today I learned the stickers with codes on them found on fresh produce, or on the bags, or ties around greens contain information:
If the PLU # begins with a 4 then the produce is grown conventionally ie. pesticides, synthetic fertilizer, etc.
If the PLU# begins with an 8 the produce is genetically modified
If the PLU# begins with a 9 the produce is organically grown ie; naturally, no synthetic fertilizers or pesticides.
I have checked a couple of internet sites that confirm this. As of yet have not been able to locate official gov't information on this yet.