ethephons

/ˈɛθəfɑnz/
noun
  1. A chemical compound used as a plant growth regulator, especially to promote ripening of fruit.
    • The use of ethephons is regulated to ensure safe levels on food crops.
    • Ethephons break down into ethylene inside the plant, which triggers ripening.
    • Farmers spray ethephons on apples to help them ripen evenly before harvest.