Question: 
asking about the insect infestation in mango plant.

Answer:  ম্যাংগো=apply dantatsu @ 40gm/ acre against control of mealy bug and termites. ( inorganic).
or apply neem oil or soap water to control the insect infestation.
=  remove the weeds in the orchard in december to january, especially under tree canopy
=put slippery, 1 foot wide bands of polyethylene around the trunk, 3 feet above the ground.
= apply grease or any other sticky material on the band for better control of insects