Bud Nip or Chlorpropham is sprayed on beets, blueberries, carrots, cranberries, onions, spinach, and tomatoes according to this video.  The young scientist reveals that Chlorpropham saturates the entire fruit or vegetable.  This is an outstanding science experiment showing that organic foods are better.

https://www.youtube.com/watch?v=vYkyBz0qDvY