Dear Sangeetha
You may find the ECHO Tropical Video Series (Part 2 of 6) - Grafting Tropical Fruit Trees and Avocados to be useful. It can be found at https://www.youtube.com/watch?v=7BbSjTVEDCc, click on the > in the far right hand column of the uploads area to get to the video. You can also do a search using keywords Colombia, youtube, papaya, Cordoba
For a success story see article "Colombia launches new project to boost papaya exports", Campesinos de Cordoba exportan papayas a Canada"
Dr. Paul Rigterink