Which of the following chemicals is used to hasten ripening of fruits?
(a) Indole-3-Butyric acid
(b) Malic hydrazide
(c) Cycocel
(d) Ethrel
Answer: d
Ethrel, containing ethephon, is a plant growth regulator used to promote uniform fruit ripening and improve coloration in various crops. It works by releasing ethylene, a natural plant hormone that triggers ripening processes. Ethrel is particularly useful for crops like mangoes, pineapples, tomatoes, and coffee.