আমের এই রকম দাগ হওয়ার কারণ কী ?

Hi dear Tapas Pramanick welcome to the plantix community dear the mango fruits show the symptom of Mango Scab and in some cases fruitfly and low capacity of boron also cause of fruits dropping and falling down the good way to control apply boron 20%+trichlorfon and after 7 days do the application of coppor oxychloride dear