Read the Numbers on Your Fruit

Today, I've received a forwarded email from my friend about the lables on the fruit. I've done a search further on the web to verify and they're all referring to the same source as below:

'The sticker labels on fruit: The numbers tell you how the fruit was grown. Conventionally grown fruit has four digits; organically grown fruit has five and starts with a nine; genetically engineered has five numbers and starts with an eight.'