The invention relates to a
fluorine-B composition, a
plant growth regulator and application thereof, and belongs to the technical field of pesticides. The invention provides a
fluorine-ethyl composition which comprises
flumetralin and
ethephon, and the
mass ratio of
flumetralin to
ethephon is 1: (0.05-20). A tip control
drug flumetralin and a tip killing
drug ethephon are creatively combined together to prepare the
fluorine-B composition, the compound preparation of flumetralin and ethephon can synergistically control and inhibit litchi winter shoots, the
pesticide effect is mild, the lasting period is longer, the safety is extremely high, and compared with a conventional
chemical control drug independently used, the effect is better, and the effect is better. The
control effect on the litchi winter shoots is more comprehensive and excellent,
germination of the winter shoots can be controlled,
nutrient accumulation of a tree body is facilitated, flower
bud differentiation is promoted, and the growth of the litchi winter shoots with a certain length can be obviously controlled or killed, so that
nutrient consumption of the tree body is reduced, and the
survival rate of the litchi is increased. And a
solid foundation is laid for high and stable yield in the second year.