Which of the following is used to check sprouting of onion under storage?

M. H. (Maleic Hydrazide) is used to check the sprouting of onion under storage.
It is generally applied as a foliar spray to crops in the field as herbicide and plant growth regulators.
It is applied to onions in the field at a rate of 2.2 kg/ha when the bulbs are mature. Five to seven green leaves are essential for adequate absorption of the compound. The crop is harvested after 2 - 4 weeks and the tops are removed.