fruit loss in Mango tree

Mango fruit fall is a severe problem. About 99% of the fruits in mango fall in different stages, and only 0.1% of the fruits reach the ripe stage.
Fruit fall can be caused by a lack of auxin hormone, lack of fertilization, loss of bisexual flowers, insufficient pollination, lack of pollen insects, disease and insect outbreaks, nutritional deficiencies, inadequate soil moisture, etc.
To prevent fruit falling in mango, mix 0.5 ml of alpha naphthalene acetic acid 4.5% SL per liter of water and spray 2-3 at intervals of 10-15 days as needed.